inno-devops-labs · zZzwat4er · Nov 11, 2024
diff --git a/.gitignore b/.gitignore
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+ipfs*/
diff --git a/submitions/lab6/submition6.md b/submitions/lab6/submition6.md
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+# Lab6
+
+## Task 1
+
+1. `system-analize`
+    ```
+     wat4er@wat4er  ~/Master/devops/Sum24-intro-labs   master  systemd-analyze
+    Startup finished in 8.733s (firmware) + 1.661s (loader) + 10.869s (kernel) + 36.645s (userspace) = 57.909s 
+    graphical.target reached after 36.644s in userspace.
+     wat4er@wat4er  ~/Master/devops/Sum24-intro-labs   master  systemd-analyze blame 
+    30.165s NetworkManager-wait-online.service
+    2.318s systemd-modules-load.service
+    1.683s NetworkManager.service
+    1.250s docker.service
+    822ms systemd-fsck@dev-disk-by\x2duuid-54690d56\x2da064\x2d4418\x2d8541\x2dc51a089e0c5a.service
+    547ms dev-disk-by\x2duuid-497791ab\x2d6339\x2d4e9b\x2dbd3d\x2d574da9f614ae.device
+    387ms systemd-backlight@backlight:intel_backlight.service
+    359ms udisks2.service
+    357ms systemd-udev-trigger.service
+    331ms home-manager-wat4er.service
+    230ms user@1000.service
+    205ms firewall.service
+    194ms systemd-journal-flush.service
+    190ms mount-pstore.service
+    174ms systemd-tmpfiles-clean.service
+    170ms systemd-journald.service
+    153ms systemd-tmpfiles-setup-dev-early.service
+    145ms systemd-pstore.service
+    145ms systemd-remount-fs.service
+    137ms upower.service
+    135ms accounts-daemon.service
+    119ms run-media-wat4er-porn.mount
+    113ms modprobe@efi_pstore.service
+    110ms bluetooth.service
+    104ms dbus.service
+    97ms modprobe@fuse.service
+    96ms boot.mount
+    95ms suid-sgid-wrappers.service
+    85ms modprobe@drm.service
+    83ms systemd-timesyncd.service
+    77ms systemd-random-seed.service
+    73ms modprobe@configfs.service
+    71ms kmod-static-nodes.service
+    67ms systemd-backlight@leds:dell::kbd_backlight.service
+    66ms resolvconf.service
+    64ms dev-mqueue.mount
+    64ms sys-kernel-debug.mount
+    63ms cups.service
+    63ms dev-hugepages.mount
+    62ms polkit.service
+    62ms ModemManager.service
+    60ms systemd-rfkill.service
+    53ms systemd-fsck@dev-disk-by\x2duuid-2049\x2d091F.service
+    51ms alsa-store.service
+    48ms systemd-logind.service
+    47ms network-setup.service
+    42ms power-profiles-daemon.service
+    39ms nvidia-persistenced.service
+    38ms systemd-tmpfiles-setup.service
+    38ms systemd-oomd.service
+    37ms systemd-udevd.service
+    35ms systemd-update-utmp.service
+    32ms systemd-vconsole-setup.service
+    30ms systemd-sysctl.service
+    29ms audit.service
+    28ms logrotate-checkconf.service
+    25ms systemd-boot-random-seed.service
+    21ms wpa_supplicant.service
+    19ms network-local-commands.service
+    17ms NetworkManager-dispatcher.service
+    17ms systemd-tmpfiles-setup-dev.service
+    15ms user-runtime-dir@1000.service
+    15ms systemd-user-sessions.service
+    13ms sys-fs-fuse-connections.mount
+    13ms sys-kernel-config.mount
+    12ms display-manager.service
+    9ms nscd.service
+    7ms rtkit-daemon.service
+    1ms docker.socket
+    ```
+    - My system loads in a minute (which is about right)
+    - The longest service to load is "NetworkManager-wait-online.service"
+
+2. `uptime`
+    ```
+    wat4er@wat4er  ~/Master/devops/Sum24-intro-labs   master  uptime     
+    04:38:44  up 4 days  8:26,  1 user,  load average: 0,42, 0,82, 1,28
+    ```
+    - Shows how long is system up
+    - Shows some "magic numbers" is load average 
+
+3. `w`
+    ```
+    wat4er@wat4er  ~/Master/devops/Sum24-intro-labs   master  w                       
+    04:38:48 up 4 days,  8:26,  1 user,  load average: 0,42, 0,82, 1,28
+    USER     TTY        LOGIN@   IDLE   JCPU   PCPU WHAT
+    wat4er   tty3      Вт20    4days  0.49s  0.49s /nix/store/sapa40f2ki28y1l2x1qnd07lwvk28j9d-plasma-workspace-6.0.5.1/bin/startplasma-wayland
+    ```
+    - `w` provides an extended wersion of `uptime` command
+
+## Task 2
+
+1. Install traceroute and dig
+    ```nix
+    # configuration.nix
+    environment.systemPackages = with pkgs; [
+        ...
+        traceroute
+        dig
+    ];
+    ```
+
+2. traceroute
+    ```
+    traceroute google.com 
+    traceroute to google.com (216.239.38.120), 30 hops max, 60 byte packets
+    1  _gateway (10.248.1.1)  1.404 ms  1.526 ms  1.638 ms
+    2  10.250.0.2 (10.250.0.2)  0.500 ms  0.486 ms  0.471 ms
+    3  10.252.6.1 (10.252.6.1)  0.966 ms  0.839 ms  1.122 ms
+    4  1.123.18.84.in-addr.arpa (84.18.123.1)  10.343 ms  10.563 ms  10.433 ms
+    5  188.170.164.138 (188.170.164.138)  22.837 ms  23.050 ms  23.294 ms
+    6  * * *
+    7  * * *
+    8  * * *
+    9  83.169.204.113 (83.169.204.113)  24.442 ms 83.169.204.115 (83.169.204.115)  23.827 ms 83.169.204.117 (83.169.204.117)  23.656 ms
+    10  178.176.152.61 (178.176.152.61)  32.130 ms 72.14.222.181 (72.14.222.181)  22.982 ms  23.290 ms
+    11  192.178.241.61 (192.178.241.61)  25.389 ms 108.170.250.51 (108.170.250.51)  24.041 ms 192.178.241.157 (192.178.241.157)  22.708 ms
+    12  192.178.241.66 (192.178.241.66)  26.185 ms 192.178.241.70 (192.178.241.70)  23.598 ms 192.178.241.146 (192.178.241.146)  24.080 ms
+    13  142.251.238.70 (142.251.238.70)  41.042 ms 142.251.237.154 (142.251.237.154)  40.355 ms 209.85.255.136 (209.85.255.136)  40.897 ms
+    14  72.14.232.190 (72.14.232.190)  41.220 ms 216.239.58.69 (216.239.58.69)  39.110 ms 172.253.79.113 (172.253.79.113)  40.424 ms
+    15  216.239.56.113 (216.239.56.113)  41.165 ms * *
+    16  * * *
+    17  * * *
+    18  * * *
+    19  * * *
+    20  * * *
+    21  * * *
+    22  * * *
+    23  * * *
+    24  * any-in-2678.1e100.net (216.239.38.120)  40.439 ms *
+    ```
+    - This command shows the path to the "google.com" (I guess)
+    - The most notable thing is that it provides addres of a gate way and addreses of UI DNS servers (I guess 10.250.0.2 and 10.252.6.1 are DNS since they are some what close to our network)
+        ```
+        ip a
+        enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
+        link/ether d8:d0:90:04:32:6f brd ff:ff:ff:ff:ff:ff
+        inet 10.248.1.20/24 brd 10.248.1.255 scope global dynamic noprefixroute enp3s0
+            valid_lft 601162sec preferred_lft 601162sec
+        inet6 fe80::e359:c5ea:fcf6:340d/64 scope link noprefixroute 
+            valid_lft forever preferred_lft forever
+        ```
+
+3. dig
+    ```
+    dig google.com               
+
+    ; <<>> DiG 9.18.27 <<>> google.com
+    ;; global options: +cmd
+    ;; Got answer:
+    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5669
+    ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
+
+    ;; OPT PSEUDOSECTION:
+    ; EDNS: version: 0, flags:; udp: 4096
+    ; COOKIE: 4735df7ed9b2e02136e2911c669c69a45c1aac35acc562ff (good)
+    ;; QUESTION SECTION:
+    ;google.com.                    IN      A
+
+    ;; ANSWER SECTION:
+    google.com.             47181   IN      CNAME   forcesafesearch.google.com.
+    forcesafesearch.google.com. 47971 IN    A       216.239.38.120
+
+    ;; Query time: 1 msec
+    ;; SERVER: 10.90.137.30#53(10.90.137.30) (UDP)
+    ;; WHEN: Sun Jul 21 04:51:32 MSK 2024
+    ;; MSG SIZE  rcvd: 113
+
+    ```