diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..95606e4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+**/.vscode
+**/*.out
+**/*.o
+**/*.cmd
+**/*.symvers
+**/*.order
+**/*.ko
+**/*.mod
+**/*.mod.c
\ No newline at end of file
diff --git a/01_git/scissors/a.out b/01_git/scissors/a.out
new file mode 100755
index 0000000..b3b5166
Binary files /dev/null and b/01_git/scissors/a.out differ
diff --git a/01_git/scissors/main.c b/01_git/scissors/main.c
new file mode 100644
index 0000000..62bd6b4
--- /dev/null
+++ b/01_git/scissors/main.c
@@ -0,0 +1,81 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include<stdbool.h>  
+
+#define UNDEFINED 0
+#define ERROR -1
+
+#define ROCK 'r'
+#define PAPER 'p'
+#define SCISSORS 's'
+
+bool is_command_valid(char command) {
+    return command == ROCK || command == PAPER || command == SCISSORS;
+}
+
+char get_computer_command() {
+    int command = rand() % 3;
+    switch (command) {
+        case 0: 
+            return ROCK;
+        case 1:
+            return PAPER;
+        case 2:
+            return SCISSORS;
+        default:
+            return UNDEFINED;
+    }
+}
+
+char define_winner(char computer_command, char user_command) {
+    if (!is_command_valid(computer_command) || !is_command_valid(user_command)) {
+        return ERROR;
+    }
+
+    if (computer_command == user_command) {
+        return UNDEFINED;    
+    } else if (computer_command == ROCK && user_command == SCISSORS) {
+        return computer_command;
+    } else if (computer_command == PAPER && user_command == ROCK) {
+        return computer_command;
+    } else if (computer_command == SCISSORS && user_command == PAPER) {
+        return computer_command;
+    } else {
+        return user_command;
+    }
+}
+
+char* get_command_name(char command) {
+    if (command == ROCK) {
+        return "rock";
+    } else if (command == PAPER) {
+        return "paper";
+    } else if (command == SCISSORS) {
+        return "scissors";
+    } else {
+        return "";
+    }
+}
+
+int main() {
+    printf("Please choose: rock (r) - paper (p) - scissors (s)\n");
+    char computer_command = get_computer_command();
+    char user_command = getchar();
+
+    char* computer_command_name = get_command_name(computer_command);
+    char* user_command_name = get_command_name(user_command);
+
+    printf("You choose %s, I choose %s\n", user_command_name, computer_command_name);
+ 
+    char winner_command = define_winner(computer_command, user_command);
+
+    if (winner_command == computer_command) {
+        printf("I win: %s beats %s\n", computer_command_name, user_command_name);
+    } else if (winner_command == user_command) {
+        printf("You win: %s beats %s\n", user_command_name, computer_command_name);
+    } else {
+        printf("Draw\n");
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/01_git/scissors/run.sh b/01_git/scissors/run.sh
new file mode 100755
index 0000000..dd40724
--- /dev/null
+++ b/01_git/scissors/run.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+rm a.out
+gcc main.c
+./a.out
\ No newline at end of file
diff --git a/02_bash/hwdetect/echo b/02_bash/hwdetect/echo
new file mode 100644
index 0000000..e69de29
diff --git a/02_bash/hwdetect/hwdetect.sh b/02_bash/hwdetect/hwdetect.sh
new file mode 100755
index 0000000..0ba1eb4
--- /dev/null
+++ b/02_bash/hwdetect/hwdetect.sh
@@ -0,0 +1,49 @@
+#!/bin/sh
+
+devices=`lsusb`
+while :
+do
+    sleep 1
+
+    new_devices=`lsusb`
+
+    # discover disconnected devices
+    for device in $devices
+    do
+        is_present=0
+        for new_device in $new_devices; 
+        do 
+            if [ $new_device = $device ]
+            then
+                is_present=1
+                break
+            fi
+        done
+        
+        if [ $is_present -eq 0 ]
+        then
+            echo "Disconnected: $device"
+        fi
+    done
+
+    # discover connected devices
+    for new_device in $new_devices
+    do
+        is_present=0
+        for device in $devices; 
+        do 
+            if [ $new_device = $device ]
+            then
+                is_present=1
+                break
+            fi
+        done
+        
+        if [ $is_present -eq 0 ]
+        then
+            echo "Connected: $new_device"
+        fi
+    done
+
+    devices=$new_devices
+done
\ No newline at end of file
diff --git a/03_module/.gitignore b/03_module/.gitignore
new file mode 100644
index 0000000..7d4c27d
--- /dev/null
+++ b/03_module/.gitignore
@@ -0,0 +1,6 @@
+module/*.cmd
+module/*.mod*
+module/*.ko
+/module/*.o
+module/Module.symvers
+module/modules.order
\ No newline at end of file
diff --git a/03_module/README.md b/03_module/README.md
new file mode 100644
index 0000000..739d55a
--- /dev/null
+++ b/03_module/README.md
@@ -0,0 +1,15 @@
+## module home work: create a simple loadable module with parameters 
+
+Create a loadadle kernel module which should accept two integer parameters and provide:
+ - A sum of parameters upon driver load
+ - A substration of parameters upon driver unload
+
+Info about module parameters can be found at: https://devarea.com/linux-kernel-development-kernel-module-parameters/#.YZfWcpFByV4
+
+Task should be performed using buildroot+qemu approach
+
+The task results should contain:
+- The module code
+- The Makefile
+- Dump of the kernel logs from the target system 
+
diff --git a/03_module/logs_dump.txt b/03_module/logs_dump.txt
new file mode 100644
index 0000000..24bd65f
--- /dev/null
+++ b/03_module/logs_dump.txt
@@ -0,0 +1,309 @@
+Linux version 5.10.7 (anatolii@anatolii-TM1707) (x86_64-buildroot-linux-uclibc-gcc.br_real (Buildroot 2021.02.7) 9.4.0, GNU ld (GNU Binutils) 2.35.2) #1 SMP Mon Nov 22 11:28:54 EET 2021
+Command line: rootwait root=/dev/vda console=tty1 console=ttyS0
+x86/fpu: x87 FPU will use FXSAVE
+BIOS-provided physical RAM map:
+BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
+BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
+BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
+BIOS-e820: [mem 0x0000000000100000-0x0000000007fdcfff] usable
+BIOS-e820: [mem 0x0000000007fdd000-0x0000000007ffffff] reserved
+BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
+NX (Execute Disable) protection: active
+SMBIOS 2.8 present.
+DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
+tsc: Fast TSC calibration using PIT
+tsc: Detected 1991.997 MHz processor
+e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
+e820: remove [mem 0x000a0000-0x000fffff] usable
+last_pfn = 0x7fdd max_arch_pfn = 0x400000000
+MTRR default type: write-back
+MTRR fixed ranges enabled:
+  00000-9FFFF write-back
+  A0000-BFFFF uncachable
+  C0000-FFFFF write-protect
+MTRR variable ranges enabled:
+  0 base 0080000000 mask FF80000000 uncachable
+  1 disabled
+  2 disabled
+  3 disabled
+  4 disabled
+  5 disabled
+  6 disabled
+  7 disabled
+x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT  
+found SMP MP-table at [mem 0x000f5aa0-0x000f5aaf]
+ACPI: Early table checksum verification disabled
+ACPI: RSDP 0x00000000000F58C0 000014 (v00 BOCHS )
+ACPI: RSDT 0x0000000007FE1550 000034 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
+ACPI: FACP 0x0000000007FE1404 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
+ACPI: DSDT 0x0000000007FE0040 0013C4 (v01 BOCHS  BXPCDSDT 00000001 BXPC 00000001)
+ACPI: FACS 0x0000000007FE0000 000040
+ACPI: APIC 0x0000000007FE1478 000078 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
+ACPI: HPET 0x0000000007FE14F0 000038 (v01 BOCHS  BXPCHPET 00000001 BXPC 00000001)
+ACPI: WAET 0x0000000007FE1528 000028 (v01 BOCHS  BXPCWAET 00000001 BXPC 00000001)
+ACPI: Local APIC address 0xfee00000
+Zone ranges:
+  DMA      [mem 0x0000000000001000-0x0000000000ffffff]
+  DMA32    [mem 0x0000000001000000-0x0000000007fdcfff]
+  Normal   empty
+Movable zone start for each node
+Early memory node ranges
+  node   0: [mem 0x0000000000001000-0x000000000009efff]
+  node   0: [mem 0x0000000000100000-0x0000000007fdcfff]
+Zeroed struct page in unavailable ranges: 133 pages
+Initmem setup node 0 [mem 0x0000000000001000-0x0000000007fdcfff]
+On node 0 totalpages: 32635
+  DMA zone: 64 pages used for memmap
+  DMA zone: 21 pages reserved
+  DMA zone: 3998 pages, LIFO batch:0
+  DMA32 zone: 448 pages used for memmap
+  DMA32 zone: 28637 pages, LIFO batch:7
+ACPI: PM-Timer IO Port: 0x608
+ACPI: Local APIC address 0xfee00000
+ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
+IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
+ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
+ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
+ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
+ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
+ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
+ACPI: IRQ0 used by override.
+ACPI: IRQ5 used by override.
+ACPI: IRQ9 used by override.
+ACPI: IRQ10 used by override.
+ACPI: IRQ11 used by override.
+Using ACPI (MADT) for SMP configuration information
+ACPI: HPET id: 0x8086a201 base: 0xfed00000
+smpboot: Allowing 1 CPUs, 0 hotplug CPUs
+[mem 0x08000000-0xfffbffff] available for PCI devices
+Booting paravirtualized kernel on bare hardware
+clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
+setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:1 nr_node_ids:1
+percpu: Embedded 42 pages/cpu s133528 r8192 d30312 u2097152
+pcpu-alloc: s133528 r8192 d30312 u2097152 alloc=1*2097152
+pcpu-alloc: [0] 0 
+Built 1 zonelists, mobility grouping on.  Total pages: 32102
+Kernel command line: rootwait root=/dev/vda console=tty1 console=ttyS0
+Dentry cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
+Inode-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
+mem auto-init: stack:off, heap alloc:off, heap free:off
+Memory: 111304K/130540K available (8195K kernel code, 900K rwdata, 1740K rodata, 896K init, 2212K bss, 18976K reserved, 0K cma-reserved)
+SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
+rcu: Hierarchical RCU implementation.
+rcu: 	RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=1.
+rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
+rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
+NR_IRQS: 4352, nr_irqs: 48, preallocated irqs: 16
+Console: colour VGA+ 80x25
+printk: console [tty1] enabled
+printk: console [ttyS0] enabled
+ACPI: Core revision 20200925
+clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
+APIC: Switch to symmetric I/O mode setup
+..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
+clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x396d4bf570c, max_idle_ns: 881590425443 ns
+Calibrating delay loop (skipped), value calculated using timer frequency.. 3983.99 BogoMIPS (lpj=7967988)
+pid_max: default: 32768 minimum: 301
+Mount-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
+Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
+Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
+Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
+Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
+Spectre V2 : Mitigation: Full AMD retpoline
+Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
+Speculative Store Bypass: Vulnerable
+Freeing SMP alternatives memory: 24K
+smpboot: CPU0: AMD QEMU Virtual CPU version 2.5+ (family: 0x6, model: 0x6, stepping: 0x3)
+Performance Events: PMU not available due to virtualization, using software events only.
+rcu: Hierarchical SRCU implementation.
+smp: Bringing up secondary CPUs ...
+smp: Brought up 1 node, 1 CPU
+smpboot: Max logical packages: 1
+smpboot: Total of 1 processors activated (3983.99 BogoMIPS)
+devtmpfs: initialized
+random: get_random_u32 called from bucket_table_alloc.isra.0+0x75/0x160 with crng_init=0
+clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
+futex hash table entries: 256 (order: 2, 16384 bytes, linear)
+NET: Registered protocol family 16
+thermal_sys: Registered thermal governor 'step_wise'
+thermal_sys: Registered thermal governor 'user_space'
+cpuidle: using governor ladder
+ACPI: bus type PCI registered
+PCI: Using configuration type 1 for base access
+ACPI: Added _OSI(Module Device)
+ACPI: Added _OSI(Processor Device)
+ACPI: Added _OSI(3.0 _SCP Extensions)
+ACPI: Added _OSI(Processor Aggregator Device)
+ACPI: Added _OSI(Linux-Dell-Video)
+ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
+ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
+ACPI: 1 ACPI AML tables successfully acquired and loaded
+ACPI: Interpreter enabled
+ACPI: (supports S0 S3 S5)
+ACPI: Using IOAPIC for interrupt routing
+PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
+ACPI: Enabled 2 GPEs in block 00 to 0F
+ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
+acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments HPX-Type3]
+acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
+PCI host bridge to bus 0000:00
+pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
+pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
+pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
+pci_bus 0000:00: root bus resource [mem 0x08000000-0xfebfffff window]
+pci_bus 0000:00: root bus resource [mem 0x100000000-0x17fffffff window]
+pci_bus 0000:00: root bus resource [bus 00-ff]
+pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
+pci 0000:00:01.0: [8086:7000] type 00 class 0x060100
+pci 0000:00:01.1: [8086:7010] type 00 class 0x010180
+pci 0000:00:01.1: reg 0x20: [io  0xc0a0-0xc0af]
+pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
+pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io  0x03f6]
+pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
+pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io  0x0376]
+pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
+pci 0000:00:01.3: quirk: [io  0x0600-0x063f] claimed by PIIX4 ACPI
+pci 0000:00:01.3: quirk: [io  0x0700-0x070f] claimed by PIIX4 SMB
+pci 0000:00:02.0: [1234:1111] type 00 class 0x030000
+pci 0000:00:02.0: reg 0x10: [mem 0xfd000000-0xfdffffff pref]
+pci 0000:00:02.0: reg 0x18: [mem 0xfebd0000-0xfebd0fff]
+pci 0000:00:02.0: reg 0x30: [mem 0xfebc0000-0xfebcffff pref]
+pci 0000:00:03.0: [1af4:1000] type 00 class 0x020000
+pci 0000:00:03.0: reg 0x10: [io  0xc080-0xc09f]
+pci 0000:00:03.0: reg 0x14: [mem 0xfebd1000-0xfebd1fff]
+pci 0000:00:03.0: reg 0x20: [mem 0xfe000000-0xfe003fff 64bit pref]
+pci 0000:00:03.0: reg 0x30: [mem 0xfeb80000-0xfebbffff pref]
+pci 0000:00:04.0: [1af4:1001] type 00 class 0x010000
+pci 0000:00:04.0: reg 0x10: [io  0xc000-0xc07f]
+pci 0000:00:04.0: reg 0x14: [mem 0xfebd2000-0xfebd2fff]
+pci 0000:00:04.0: reg 0x20: [mem 0xfe004000-0xfe007fff 64bit pref]
+pci_bus 0000:00: on NUMA node 0
+ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
+ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
+ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
+ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
+ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
+pci 0000:00:02.0: vgaarb: setting as boot VGA device
+pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
+pci 0000:00:02.0: vgaarb: bridge control possible
+vgaarb: loaded
+SCSI subsystem initialized
+libata version 3.00 loaded.
+ACPI: bus type USB registered
+usbcore: registered new interface driver usbfs
+usbcore: registered new interface driver hub
+usbcore: registered new device driver usb
+Advanced Linux Sound Architecture Driver Initialized.
+PCI: Using ACPI for IRQ routing
+PCI: pci_cache_line_size set to 64 bytes
+e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff]
+e820: reserve RAM buffer [mem 0x07fdd000-0x07ffffff]
+clocksource: Switched to clocksource tsc-early
+pnp: PnP ACPI init
+pnp 00:00: Plug and Play ACPI device, IDs PNP0303 (active)
+pnp 00:01: Plug and Play ACPI device, IDs PNP0f13 (active)
+pnp 00:02: [dma 2]
+pnp 00:02: Plug and Play ACPI device, IDs PNP0700 (active)
+pnp 00:03: Plug and Play ACPI device, IDs PNP0400 (active)
+pnp 00:04: Plug and Play ACPI device, IDs PNP0501 (active)
+pnp 00:05: Plug and Play ACPI device, IDs PNP0b00 (active)
+pnp: PnP ACPI: found 6 devices
+clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
+NET: Registered protocol family 2
+tcp_listen_portaddr_hash hash table entries: 256 (order: 0, 4096 bytes, linear)
+TCP established hash table entries: 1024 (order: 1, 8192 bytes, linear)
+TCP bind hash table entries: 1024 (order: 2, 16384 bytes, linear)
+TCP: Hash tables configured (established 1024 bind 1024)
+UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
+UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
+NET: Registered protocol family 1
+pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7 window]
+pci_bus 0000:00: resource 5 [io  0x0d00-0xffff window]
+pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
+pci_bus 0000:00: resource 7 [mem 0x08000000-0xfebfffff window]
+pci_bus 0000:00: resource 8 [mem 0x100000000-0x17fffffff window]
+pci 0000:00:01.0: PIIX3: Enabling Passive Release
+pci 0000:00:00.0: Limiting direct PCI/PCI transfers
+pci 0000:00:01.0: Activating ISA DMA hang workarounds
+pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
+PCI: CLS 0 bytes, default 64
+workingset: timestamp_bits=62 max_order=15 bucket_order=0
+Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
+io scheduler mq-deadline registered
+io scheduler kyber registered
+input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
+ACPI: Power Button [PWRF]
+PCI Interrupt Link [LNKC] enabled at IRQ 11
+PCI Interrupt Link [LNKD] enabled at IRQ 10
+Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
+00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
+bochs-drm 0000:00:02.0: vgaarb: deactivate vga console
+Console: switching to colour dummy device 80x25
+[drm] Found bochs VGA, ID 0xb0c0.
+[drm] Framebuffer size 16384 kB @ 0xfd000000, mmio @ 0xfebd0000.
+[TTM] Zone  kernel: Available graphics memory: 55794 KiB
+[TTM] Initializing pool allocator
+[TTM] Initializing DMA pool allocator
+[drm] Found EDID data blob.
+[drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0
+fbcon: bochs-drmdrmfb (fb0) is primary device
+Console: switching to colour frame buffer device 128x48
+bochs-drm 0000:00:02.0: [drm] fb0: bochs-drmdrmfb frame buffer device
+virtio_blk virtio1: [vda] 122880 512-byte logical blocks (62.9 MB/60.0 MiB)
+vda: detected capacity change from 0 to 62914560
+ata_piix 0000:00:01.1: version 2.13
+scsi host0: ata_piix
+scsi host1: ata_piix
+ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc0a0 irq 14
+ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc0a8 irq 15
+ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
+ehci-pci: EHCI PCI platform driver
+uhci_hcd: USB Universal Host Controller Interface driver
+usbcore: registered new interface driver usb-storage
+i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
+serio: i8042 KBD port at 0x60,0x64 irq 1
+serio: i8042 AUX port at 0x60,0x64 irq 12
+usbcore: registered new interface driver usbhid
+usbhid: USB HID core driver
+input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
+NET: Registered protocol family 10
+Segment Routing with IPv6
+sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
+NET: Registered protocol family 17
+IPI shorthand broadcast: enabled
+sched_clock: Marking stable (981626737, 18660054)->(1003751110, -3464319)
+ALSA device list:
+  No soundcards found.
+ata2.01: NODEV after polling detection
+ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
+scsi 1:0:0:0: CD-ROM            QEMU     QEMU DVD-ROM     2.5+ PQ: 0 ANSI: 5
+tsc: Refined TSC clocksource calibration: 1991.968 MHz
+clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x396d1603e08, max_idle_ns: 881590726352 ns
+clocksource: Switched to clocksource tsc
+input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
+EXT4-fs (vda): mounting ext2 file system using the ext4 subsystem
+EXT4-fs (vda): mounted filesystem without journal. Opts: (null)
+VFS: Mounted root (ext2 filesystem) readonly on device 254:0.
+devtmpfs: mounted
+Freeing unused kernel image (initmem) memory: 896K
+Write protecting the kernel read-only data: 12288k
+Freeing unused kernel image (text/rodata gap) memory: 2044K
+Freeing unused kernel image (rodata/data gap) memory: 308K
+Run /sbin/init as init process
+  with arguments:
+    /sbin/init
+  with environment:
+    HOME=/
+    TERM=linux
+EXT4-fs (vda): warning: mounting unchecked fs, running e2fsck is recommended
+EXT4-fs (vda): re-mounted. Opts: (null)
+ext2 filesystem being remounted at / supports timestamps until 2038 (0x7fffffff)
+random: fast init done
+random: dd: uninitialized urandom read (512 bytes read)
+random: mktemp: uninitialized urandom read (6 bytes read)
+random: mktemp: uninitialized urandom read (6 bytes read)
+hello: loading out-of-tree module taints kernel.
+hello: module license 'unspecified' taints kernel.
+Disabling lock debugging due to kernel taint
+Hi world! 6
+Bye world! 2
diff --git a/03_module/module/Makefile b/03_module/module/Makefile
new file mode 100644
index 0000000..44db04f
--- /dev/null
+++ b/03_module/module/Makefile
@@ -0,0 +1,10 @@
+KERNELDIR ?= /home/anatolii/Projects/buildroot/buildroot-2021.02.7/output/build/linux-5.10.7/
+
+obj-m := hello.o
+
+all:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) clean
+
diff --git a/03_module/module/hello.c b/03_module/module/hello.c
new file mode 100644
index 0000000..d1f1853
--- /dev/null
+++ b/03_module/module/hello.c
@@ -0,0 +1,20 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+
+static int a=0;
+module_param(a,int,0660);
+
+static int b=0;
+module_param(b,int,0660);
+
+int init_module(void)
+{
+	printk(KERN_INFO "Hi world! %d\n", a + b);
+	return 0;
+}
+
+void cleanup_module(void) {
+	printk(KERN_INFO "Bye world! %d\n", a - b);
+}
+
diff --git a/04_basic_struct/.gitignore b/04_basic_struct/.gitignore
new file mode 100644
index 0000000..7d4c27d
--- /dev/null
+++ b/04_basic_struct/.gitignore
@@ -0,0 +1,6 @@
+module/*.cmd
+module/*.mod*
+module/*.ko
+/module/*.o
+module/Module.symvers
+module/modules.order
\ No newline at end of file
diff --git a/04_basic_struct/README.md b/04_basic_struct/README.md
new file mode 100644
index 0000000..445d6dc
--- /dev/null
+++ b/04_basic_struct/README.md
@@ -0,0 +1,7 @@
+## Basic structure homework
+Implement object with name “MyObject” which is parent of kernel_kobj.    
+Object should include linked_list structure.    
+This object should contain sysfs attribute with name “list”.    
+On read form attribute “list” it should show content of the objects linked list.    
+On write to attribute “list” it should add new string to the objects linked list.    
+!! Do not forget properly free all the resources during rmmod.    
diff --git a/04_basic_struct/module/Makefile b/04_basic_struct/module/Makefile
new file mode 100644
index 0000000..f9daf33
--- /dev/null
+++ b/04_basic_struct/module/Makefile
@@ -0,0 +1,11 @@
+KERNELDIR ?= /home/anatolii/Projects/buildroot/buildroot-2021.02.7/output/build/linux-5.10.7/
+
+obj-m := hello.o
+CFLAGS_hello.o := -DDEBUG
+
+all:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) clean
+
diff --git a/04_basic_struct/module/hello.c b/04_basic_struct/module/hello.c
new file mode 100644
index 0000000..bc79d60
--- /dev/null
+++ b/04_basic_struct/module/hello.c
@@ -0,0 +1,111 @@
+#define pr_fmt(fmt) "%s: " fmt,  KBUILD_MODNAME
+
+#include <linux/module.h> // Core header for loading LKMs into the kernel
+#include <linux/kobject.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+
+struct node {
+	char *value;
+	struct list_head list_member;
+};
+
+static LIST_HEAD(nodeHead);
+
+static void add_node(char *value, struct list_head *head)
+{
+	pr_debug("---> %s", __func__);
+	struct node *nodePtr = kmalloc(sizeof(struct node), GFP_KERNEL);
+
+	if (nodePtr == NULL)
+		pr_err("Node creation error");
+	nodePtr->value = value;
+	INIT_LIST_HEAD(&nodePtr->list_member);
+	list_add(&(nodePtr->list_member), head);
+	pr_debug("---< %s", __func__);
+}
+
+static ssize_t list_show(struct kobject *kobj, struct kobj_attribute *attr,
+	char *buf)
+{
+	pr_debug("---> %s", __func__);
+	struct list_head *iter;
+	struct node *nodePtr;
+
+	int bufSize = 0;
+
+	list_for_each(iter, &nodeHead) {
+		nodePtr = list_entry(iter, struct node, list_member);
+		strcpy(buf + bufSize, nodePtr->value);
+		bufSize += strlen(nodePtr->value);
+		pr_debug("Node copy to buf: %s", nodePtr->value);
+	}
+	pr_debug("---< %s", __func__);
+	return bufSize;
+}
+
+static ssize_t list_store(struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	pr_debug("---> %s size_t: %ld", __func__, count);
+	char *value = kcalloc(count, sizeof(char), GFP_KERNEL);
+
+	memcpy(value, buf, count);
+	pr_debug("value created: %ld", strlen(value));
+	add_node(value, &nodeHead);
+	pr_debug("---< %s", __func__);
+	return count;
+}
+
+static struct kobj_attribute list_attribute =
+	__ATTR(list, 0664, list_show, list_store);
+
+static struct kobject *my_kobj;
+
+static int hello_init(void)
+{
+	pr_debug("---> %s", __func__);
+	int res = 0;
+
+	my_kobj = kobject_create_and_add("MyObject", kernel_kobj);
+	if (!my_kobj) {
+		pr_err("Object was not created");
+		return -ENOMEM;
+	}
+	res = sysfs_create_file(my_kobj, &list_attribute.attr);
+	if (res) {
+		pr_err("Attribute for Object was not created");
+		kobject_put(my_kobj);
+	}
+	pr_debug("---< %s", __func__);
+	return res;
+}
+
+static void hello_exit(void)
+{
+	pr_debug("---> %s", __func__);
+	struct node *nodePtr;
+	struct node *tmp;
+
+	list_for_each_entry_safe(nodePtr, tmp, &nodeHead, list_member) {
+		pr_debug("Clean node: %s", nodePtr->value);
+		kfree(nodePtr->value);
+		list_del(&(nodePtr->list_member));
+		kfree(nodePtr);
+	}
+	pr_debug("List_empty: %d", list_empty(&nodeHead));
+	kobject_put(my_kobj);
+
+	pr_debug("---< %s", __func__);
+}
+
+module_init(hello_init);
+module_exit(hello_exit);
+
+MODULE_AUTHOR("Anatolii Berchanov <tberchanov@gmail.com>");
+MODULE_DESCRIPTION("Basic data structures module");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1");
diff --git a/05_timers/README.md b/05_timers/README.md
new file mode 100644
index 0000000..55b41f2
--- /dev/null
+++ b/05_timers/README.md
@@ -0,0 +1,10 @@
+## Homework: Linux Kernel Time Management
+
+1. Implement program which return absolute time in user space.
+Use clock_gettime() from time.h. Try different clock id.
+Find the difference. Show possible clock resolution provided by clock_getres().
+
+2. Implement kernel module with API in sysfs, which returns relative
+time in maximum possible resolution passed since previous read of it.
+Implement kernel module with API in sysfs which returns absolute time
+of previous reading with maximum resolution like ‘400.123567’ seconds.
diff --git a/05_timers/module/Makefile b/05_timers/module/Makefile
new file mode 100644
index 0000000..701321b
--- /dev/null
+++ b/05_timers/module/Makefile
@@ -0,0 +1,11 @@
+KERNELDIR ?= /home/anatolii/Projects/buildroot/buildroot-2021.02.7/output/build/linux-5.10.7/
+
+obj-m := time_module.o
+CFLAGS_time_module.o := -DDEBUG
+
+all:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+
+clean:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) clean
+
diff --git a/05_timers/module/logs.txt b/05_timers/module/logs.txt
new file mode 100644
index 0000000..0006f12
--- /dev/null
+++ b/05_timers/module/logs.txt
@@ -0,0 +1,66 @@
+# pwd
+/sys/kernel
+# insmod /home/user/time_module.ko 
+# cd time/
+# ls -l
+total 0
+-r--r--r--    1 root     root          4096 Dec  8 10:24 absolute
+-rw-rw-r--    1 root     root          4096 Dec  8 10:24 relative
+# cat relative 
+# cat relative 
+Delta: 2453508690
+# cat relative 
+Delta: 2571053950
+# cat relative 
+Delta: 4401452740
+# echo "reset" > relative 
+# cat relative 
+# cat relative 
+Delta: 1044315750
+# 
+# cat absolute 
+Absolute: 0.000000000
+# cat absolute 
+Absolute: 1638959167.971671309
+# cat absolute 
+Absolute: 1638959169.873894859
+# echo "reset" > absolute 
+-sh: can't create absolute: Permission denied
+# dmesg
+time_module: ---< time_exit
+time_module: ---> time_init
+time_module: ---< time_init
+time_module: ---> relative_show
+time_module: Previous time initialization: 3862439910169
+time_module: ---< relative_show
+time_module: ---> relative_show
+Delta: 2453508690
+time_module: Previous time updated: 3864893418859
+time_module: ---< relative_show
+time_module: ---> relative_show
+Delta: 2571053950
+time_module: Previous time updated: 3867464472809
+time_module: ---< relative_show
+time_module: ---> relative_show
+Delta: 4401452740
+time_module: Previous time updated: 3871865925549
+time_module: ---< relative_show
+time_module: ---> relative_store size_t: 6
+time_module: Previous time reset: 3871865925549
+time_module: ---< relative_store
+time_module: ---> relative_show
+time_module: Previous time initialization: 3887672222959
+time_module: ---< relative_show
+time_module: ---> relative_show
+Delta: 1044315750
+time_module: Previous time updated: 3888716538709
+time_module: ---< relative_show
+time_module: ---> absolute_show
+Absolute: 0.000000000
+time_module: ---< absolute_show
+time_module: ---> absolute_show
+Absolute: 1638959167.971671309
+time_module: ---< absolute_show
+time_module: ---> absolute_show
+Absolute: 1638959169.873894859
+# 
diff --git a/05_timers/module/time_module.c b/05_timers/module/time_module.c
new file mode 100644
index 0000000..67f1d33
--- /dev/null
+++ b/05_timers/module/time_module.c
@@ -0,0 +1,120 @@
+#define pr_fmt(fmt) "%s: " fmt,  KBUILD_MODNAME
+
+#include <linux/module.h> // Core header for loading LKMs into the kernel
+#include <linux/kobject.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/timekeeping.h>
+#include <linux/ktime.h>
+#include <linux/time64.h>
+
+static ktime_t prev_time = 0;
+static ktime_t prev_abs_time = 0;
+
+static ssize_t relative_show(struct kobject *kobj, struct kobj_attribute *attr,
+	char *buf)
+{
+	pr_debug("---> %s", __func__);
+
+	if (prev_time == 0) {
+		prev_time = ktime_get();
+		pr_debug("Previous time initialization: %llu", prev_time);
+	} else {
+		ktime_t cur_time = ktime_get();
+		ktime_t delta = ktime_sub(cur_time, prev_time);
+		printk(KERN_INFO "Delta: %llu", delta);
+		prev_time = cur_time;
+		pr_debug("Previous time updated: %llu", prev_time);
+	}
+
+	pr_debug("---< %s", __func__);
+	return 0;
+}
+
+static ssize_t relative_store(struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	pr_debug("---> %s size_t: %ld", __func__, count);
+	
+	if (sysfs_streq(buf, "reset")) {
+		pr_debug("Previous time reset: %llu", prev_time);
+		prev_time = 0;
+	}
+
+	pr_debug("---< %s", __func__);
+	return count;
+}
+
+static ssize_t absolute_show(struct kobject *kobj, struct kobj_attribute *attr,
+	char *buf)
+{
+	struct timespec64 ts;
+	pr_debug("---> %s", __func__);
+	ts = ktime_to_timespec64(prev_abs_time);
+	printk(KERN_INFO "Absolute: %lld.%09ld", ts.tv_sec, ts.tv_nsec);
+	prev_abs_time = ktime_get_real();
+	pr_debug("---< %s", __func__);
+	return 0;
+}
+
+static ssize_t absolute_store(struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	pr_debug("---> %s size_t: %ld", __func__, count);
+
+	pr_debug("---< %s", __func__);
+	return count;
+}
+
+static struct kobj_attribute relative_attribute =
+	__ATTR(relative, 0664, relative_show, relative_store);
+
+static struct kobj_attribute absolute_attribute =
+	__ATTR(absolute, 0444, absolute_show, absolute_store);
+
+static struct kobject *time_kobj;
+
+static int time_init(void)
+{
+	int res = 0;
+
+	pr_debug("---> %s", __func__);
+
+	time_kobj = kobject_create_and_add("time", kernel_kobj);
+	if (!time_kobj) {
+		pr_err("Object was not created");
+		return -ENOMEM;
+	}
+	res = sysfs_create_file(time_kobj, &relative_attribute.attr);
+	if (res) {
+		pr_err("Attribute for Object was not created");
+		kobject_put(time_kobj);
+	}
+	res = sysfs_create_file(time_kobj, &absolute_attribute.attr);
+	if (res) {
+		pr_err("Attribute for Object was not created");
+		kobject_put(time_kobj);
+	}
+	pr_debug("---< %s", __func__);
+	return res;
+}
+
+static void time_exit(void)
+{
+	pr_debug("---> %s", __func__);
+
+	kobject_put(time_kobj);
+
+	pr_debug("---< %s", __func__);
+}
+
+module_init(time_init);
+module_exit(time_exit);
+
+MODULE_AUTHOR("Anatolii Berchanov <tberchanov@gmail.com>");
+MODULE_DESCRIPTION("Time module");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1");
diff --git a/05_timers/userspace/logs.txt b/05_timers/userspace/logs.txt
new file mode 100644
index 0000000..08d0e9a
--- /dev/null
+++ b/05_timers/userspace/logs.txt
@@ -0,0 +1,55 @@
+Clock - CLOCK_REALTIME
+        time sec  1638696837
+        time nsec  265112465
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_REALTIME_ALARM
+        time sec  1638696837
+        time nsec  265126215
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_REALTIME_COARSE
+        time sec  1638696837
+        time nsec  263821244
+        res sec  0
+        rs nsec  4000000
+Clock - CLOCK_TAI
+        time sec  1638696837
+        time nsec  265145840
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_MONOTONIC
+        time sec  34890
+        time nsec  523876764
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_MONOTONIC_COARSE
+        time sec  34890
+        time nsec  522528835
+        res sec  0
+        rs nsec  4000000
+Clock - CLOCK_MONOTONIC_RAW
+        time sec  34889
+        time nsec  761360235
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_BOOTTIME
+        time sec  165057
+        time nsec  208177337
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_BOOTTIME_ALARM
+        time sec  165057
+        time nsec  208205837
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_PROCESS_CPUTIME_ID
+        time sec  3
+        time nsec  274211482
+        res sec  0
+        rs nsec  1
+Clock - CLOCK_THREAD_CPUTIME_ID
+        time sec  3
+        time nsec  274244959
+        res sec  0
+        rs nsec  1
\ No newline at end of file
diff --git a/05_timers/userspace/main.c b/05_timers/userspace/main.c
new file mode 100644
index 0000000..834b237
--- /dev/null
+++ b/05_timers/userspace/main.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#include <errno.h>
+#include <string.h>
+
+void print_clock_details(clockid_t id, char *label) {
+    printf("Clock - %s\n", label);
+    struct timespec tp;
+    int result = 0;
+    result = clock_gettime(id, &tp);
+    if (result != 0) {
+        printf("Error clock_gettime: %s", strerror(errno));
+    }
+    printf("\ttime sec  %ld\n", tp.tv_sec);
+    printf("\ttime nsec  %ld\n", tp.tv_nsec);
+    
+    result = clock_getres(id, &tp);
+    if (result != 0) {
+        printf("Error clock_getres: %s", strerror(errno));
+    }
+    printf("\tres sec  %ld\n", tp.tv_sec);
+    printf("\trs nsec  %ld\n", tp.tv_nsec);
+}
+
+// immitation of calculations, to show THREAD_CPUTIME and PROCESS_CPUTIME
+void calculate() {
+    int i = 1;
+    while (i > 0)
+    {
+        i++;
+    }
+}
+
+int main() {
+    calculate();
+    
+    clockid_t clockid_array[] = {
+        CLOCK_REALTIME,
+        CLOCK_REALTIME_ALARM,
+        CLOCK_REALTIME_COARSE,
+        CLOCK_TAI,
+        CLOCK_MONOTONIC,
+        CLOCK_MONOTONIC_COARSE,
+        CLOCK_MONOTONIC_RAW,
+        CLOCK_BOOTTIME,
+        CLOCK_BOOTTIME_ALARM,
+        CLOCK_PROCESS_CPUTIME_ID,
+        CLOCK_THREAD_CPUTIME_ID
+    };
+    char* clockid_labels_array[] = {
+        "CLOCK_REALTIME",
+        "CLOCK_REALTIME_ALARM",
+        "CLOCK_REALTIME_COARSE",
+        "CLOCK_TAI",
+        "CLOCK_MONOTONIC",
+        "CLOCK_MONOTONIC_COARSE",
+        "CLOCK_MONOTONIC_RAW",
+        "CLOCK_BOOTTIME",
+        "CLOCK_BOOTTIME_ALARM",
+        "CLOCK_PROCESS_CPUTIME_ID",
+        "CLOCK_THREAD_CPUTIME_ID"
+    };
+
+    int size = sizeof clockid_array / sizeof clockid_array[0];
+    for (int i = 0; i < size; i++) {
+        print_clock_details(clockid_array[i], clockid_labels_array[i]);
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/05_timers/userspace/run.sh b/05_timers/userspace/run.sh
new file mode 100755
index 0000000..dd40724
--- /dev/null
+++ b/05_timers/userspace/run.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+rm a.out
+gcc main.c
+./a.out
\ No newline at end of file
diff --git a/06_memory/README.md b/06_memory/README.md
new file mode 100644
index 0000000..4c22613
--- /dev/null
+++ b/06_memory/README.md
@@ -0,0 +1,22 @@
+# Memory management
+
+## Homework
+1. Create user-space C or C++ program which tries to allocate buffers
+  with sizes 2^x for x in range from 0 to maximium possible value 
+  using functions:
+  **malloc, calloc, alloca, (optional for C++) new **.
+  Measure time of each allocation/freeing.
+  2^x means x power of 2 in this task.
+Pull request should contains program source code and program output
+in text format.
+
+2. Create kernel module and test allocation/freeing time for functions:
+  **kmalloc, kzmalloc, vmalloc, get_free_pages,
+   (optional and only for drivers integrated to kernel)alloc_bootmem**.
+  Measure the time of each allocation/freeing except alloc_bootmem.
+  The results should be presented in text file table with followed columns:
+  Buffer size, allocation time, freeing time.
+  Size unit is 1 byte, time unit is 1 ns.
+
+Pull request should contains source code of developed driver, Makefile
+and program output from system log in text format.
diff --git a/logs.txt b/logs.txt
new file mode 100644
index 0000000..b1a8e0d
--- /dev/null
+++ b/logs.txt
@@ -0,0 +1,42 @@
+# insmod /home/user/hello.ko 
+# cd MyObject/
+# echo "qwety1" > list
+# echo "qwety2" > list
+# echo "qwety3" > list
+# cat list
+qwety3
+qwety2
+qwety1
+# dmesg
+hello: ---< list_show
+hello: ---> hello_exit
+hello: Clean node: qwety3
+hello: Clean node: qwety2
+hello: Clean node: q1
+hello: List_empty: 1
+hello: ---< hello_exit
+hello: ---> hello_init
+hello: ---< hello_init
+hello: ---> list_store size_t: 7
+hello: value created: 7
+hello: ---> add_node
+hello: ---< add_node
+hello: ---< list_store
+hello: ---> list_store size_t: 7
+hello: value created: 7
+hello: ---> add_node
+hello: ---< add_node
+hello: ---< list_store
+hello: ---> list_store size_t: 7
+hello: value created: 7
+hello: ---> add_node
+hello: ---< add_node
+hello: ---< list_store
+hello: ---> list_show
+hello: Node copy to buf: qwety3
+hello: Node copy to buf: qwety2
+hello: Node copy to buf: qwety1
+# pwd
+/sys/kernel/MyObject
+# 
+