From e9ed6a30b9691399a700b8547c449acf48e112da Mon Sep 17 00:00:00 2001 From: Seva Peretiatko Date: Fri, 30 Jan 2026 18:07:21 +0300 Subject: [PATCH 1/2] docs: add PR template --- .github/pull_request_template.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 .github/pull_request_template.md diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md new file mode 100644 index 00000000..bd41fa5e --- /dev/null +++ b/.github/pull_request_template.md @@ -0,0 +1,15 @@ +## Goal + + +## Changes + +- + +## Testing + +- + +## Checklist +- [ ] PR title clearly describes the changes +- [ ] Documentation/README updated (if needed) +- [ ] No secrets or large temporary files committed From 2de692abe432e6fb5e6a3bbe713d238f74f80438 Mon Sep 17 00:00:00 2001 From: Seva Peretiatko Date: Sat, 28 Feb 2026 22:54:56 +0300 Subject: [PATCH 2/2] docs: add lab5 submission --- labs/submission5.md | 233 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 labs/submission5.md diff --git a/labs/submission5.md b/labs/submission5.md new file mode 100644 index 00000000..f0a4bae8 --- /dev/null +++ b/labs/submission5.md @@ -0,0 +1,233 @@ +# Lab 5 Submission + +## Task 1 - VirtualBox Installation + +### 1.1. Install VirtualBox + +I installed `VirtualBox` on my Windows 11 system using the official installer with default settings. + +### 1.2. Verify Installation + +#### VirtualBox version number + +I opened VirtualBox and checked the installed version. + +VirtualBox version number - `7.2.4 r170995` + + +### Host operating system and version + +`Windows 11 25H2` + + +### Installation issues encountered + +No installation issues were encountered. The installation process completed successfully. + + +## Task 2 - Ubuntu VM and System Analysis + +### 2.1. VM Setup + +I created a new virtual machine and configured it with the following parameters: + +- OS Version: `Ubuntu-24.04.4` +- RAM: `6144` MB +- CPU: `2` cores +- Storage: `30` GB + +### 2.2. System Information Discovery + +#### CPU Details + +I used the `lscpu` command to check CPU architecture and core information: + +```bash +user@user-pc:~$ lscpu +Architecture: x86_64 + CPU op-mode(s): 32-bit, 64-bit + Address sizes: 39 bits physical, 48 bits virtual + Byte Order: Little Endian +CPU(s): 2 + On-line CPU(s) list: 0,1 +Vendor ID: GenuineIntel + Model name: 13th Gen Intel(R) Core(TM) i5-13420H + CPU family: 6 + Model: 186 + Thread(s) per core: 1 + Core(s) per socket: 2 + Socket(s): 1 + Stepping: 2 + BogoMIPS: 5222.39 + Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxs + r sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpu + id tsc_known_freq pni ssse3 cx16 sse4_1 sse4_2 x2apic movbe popcnt hypervisor lahf_lm a + bm fsgsbase bmi1 bmi2 invpcid arat md_clear flush_l1d arch_capabilities +Virtualization features: + Hypervisor vendor: KVM + Virtualization type: full +Caches (sum of all): + L1d: 96 KiB (2 instances) + L1i: 64 KiB (2 instances) + L2: 2.5 MiB (2 instances) + L3: 24 MiB (2 instances) +NUMA: + NUMA node(s): 1 + NUMA node0 CPU(s): 0,1 +Vulnerabilities: + Gather data sampling: Not affected + Ghostwrite: Not affected + Itlb multihit: Not affected + L1tf: Not affected + Mds: Not affected + Meltdown: Not affected + Mmio stale data: Not affected + Reg file data sampling: Vulnerable: No microcode + Retbleed: Not affected + Spec rstack overflow: Not affected + Spec store bypass: Vulnerable + Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization + Spectre v2: Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS Not affected; BHI SW l + oop, KVM SW loop + Srbds: Not affected + Tsx async abort: Not affected + +``` + +The output shows: +- Architecture: `x86_64` +- `2 CPU cores` assigned +- `Intel` processor model +- `Full virtualization` enabled + +This confirms that the VM uses `2 cores` and runs in a `virtualized environment`. + +#### Memory Information + +I used the `free -h` command to check RAM usage: + +```bash +user@user-pc:~$ free -h + total used free shared buff/cache available +Mem: 5.8Gi 786Mi 4.6Gi 11Mi 691Mi 5.0Gi +Swap: 0B 0B 0B +``` + +The output shows: +- Total memory: `5.8` GiB +- Most memory is `available` +- No `swap space` configured + +This confirms that around `6 GB` RAM is allocated to the VM. + + +#### Network Configuration + +I used the `ip a` and `hostname -I` commands to check network interfaces and IP addresses: + +```bash +user@user-pc:~$ ip a +1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 + link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 + inet 127.0.0.1/8 scope host lo + valid_lft forever preferred_lft forever + inet6 ::1/128 scope host noprefixroute + valid_lft forever preferred_lft forever +2: enp0s3: mtu 1500 qdisc fq_codel state UP group default qlen 1000 + link/ether 08:00:27:d3:da:08 brd ff:ff:ff:ff:ff:ff + inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic noprefixroute enp0s3 + valid_lft 86000sec preferred_lft 86000sec + inet6 fd17:625c:f037:2:ea1b:5f56:fd36:c59a/64 scope global temporary dynamic + valid_lft 86319sec preferred_lft 14319sec + inet6 fd17:625c:f037:2:ad1e:99b0:1de4:dd73/64 scope global dynamic mngtmpaddr noprefixroute + valid_lft 86319sec preferred_lft 14319sec + inet6 fe80::d664:4a34:b1d4:31ea/64 scope link noprefixroute + valid_lft forever preferred_lft forever + +user@user-pc:~$ hostname -I +10.0.2.15 fd17:625c:f037:2:ea1b:5f56:fd36:c59a fd17:625c:f037:2:ad1e:99b0:1de4:dd73 +``` + +The output shows: +- Loopback interface (lo) +- Main network interface (enp0s3) +- IPv4 address: `10.0.2.15` + +This confirms that the VM is connected to the network using `NAT configuration`. + + +#### Storage Information + +I used the `df -h` command to check disk usage: + +```bash +user@user-pc:~$ df -h +Filesystem Size Used Avail Use% Mounted on +tmpfs 593M 1.2M 592M 1% /run +/dev/sda1 30G 23G 5.7G 80% / +tmpfs 2.9G 0 2.9G 0% /dev/shm +tmpfs 5.0M 8.0K 5.0M 1% /run/lock +shared 200G 148G 53G 74% /home/user/shared +tmpfs 593M 120K 593M 1% /run/user/1000 +``` + +The output shows: +- Root partition size: `30G` +- `23G` used +- `5.7G` available + +This confirms that the virtual disk is correctly mounted and working. + + +#### Operating System + +I used `cat /etc/os-release` and `uname -r` to check OS version and kernel versionŠ– + +```bash +user@user-pc:~$ cat /etc/os-release +No LSB modules are available. +Distributor ID: Ubuntu +Description: Ubuntu 24.04.4 LTS +Release: 24.04 +Codename: noble + +user@user-pc:~$ uname -r +6.17.0-14-generic +``` + +The output shows: +- `Ubuntu 24.04.4 LTS` +- Kernel version `6.17.0-14-generic` + +This confirms that the system is running `Ubuntu 24.04 LTS`. + + +#### Virtualization Detection + +I used `systemd-detect-virt` and `dmidecode` to confirm virtualization: + +```bash +user@user-pc:~$ systemd-detect-virt +oracle + +user@user-pc:~$ sudo dmidecode | grep -i virtual +[sudo] password for user: + Version: VirtualBox + Product Name: VirtualBox + Family: Virtual Machine + Product Name: VirtualBox +``` + +The output shows: +- Virtualization: `oracle` +- Hardware model: `VirtualBox` + +This confirms that the system is running inside `VirtualBox`. + + +#### Brief reflection + +During this lab, I explored basic Linux system commands to analyze hardware and OS information. +The most useful tools were `lscpu`, `free`, `ip`, and `df` because they provide clear and structured system data. +The command `systemd-detect-virt` was especially helpful to confirm virtualization. +This lab helped me better understand how to inspect system configuration inside a `virtual machine`. \ No newline at end of file