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linux_notes [2022/11/06 07:08] – [ls and mv] rajulinux_notes [2023/09/24 15:33] (current) – [what is my OS?] raju
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   * [[add numbers on the command line]]   * [[add numbers on the command line]]
   * [[du on month end dates]]   * [[du on month end dates]]
 +  * [[change the default shell]]
 +  * [[Which shell am I using | Which shell am I using?]]
 +  * [[Difference between SHELL and 0 | What is the difference between \$SHELL and \$0?]]
  
 +==== what is my OS? ====
 +<code>
 +awk -F= '$1=="ID" {print $2}' /etc/os-release
 +</code>
 +
 +Sample run:
 +<code>
 +% cat /etc/os-release
 +PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
 +NAME="Debian GNU/Linux"
 +VERSION_ID="12"
 +VERSION="12 (bookworm)"
 +VERSION_CODENAME=bookworm
 +ID=debian
 +HOME_URL="https://www.debian.org/"
 +SUPPORT_URL="https://www.debian.org/support"
 +BUG_REPORT_URL="https://bugs.debian.org/"
 +</code>
 +
 +<code>
 +% awk -F= '$1=="ID" {print $2}' /etc/os-release     
 +debian
 +</code>
 +
 +Ref:
 +  * I came across it in https://github.com/trimclain/.dotfiles/blob/main/Makefile
 +
 +==== last reboot times ====
 +<code>
 +last reboot --time-format full
 +</code>
 +
 +Sample run
 +<code>
 + % last reboot --time-format full
 +reboot   system boot  5.10.0-17-amd64  Tue Dec  6 08:18:33 2022   still running
 +reboot   system boot  5.10.0-17-amd64  Tue Dec  6 08:11:34 2022 - Tue Dec  6 08:17:36 2022  (00:06)
 +reboot   system boot  5.10.0-17-amd64  Tue Dec  6 07:41:53 2022 - Tue Dec  6 08:11:01 2022  (00:29)
 +reboot   system boot  5.10.0-17-amd64  Sat Dec  3 13:18:10 2022 - Tue Dec  6 08:11:01 2022 (2+18:52)
 +reboot   system boot  5.10.0-17-amd64  Sat Dec  3 13:04:06 2022 - Tue Dec  6 08:11:01 2022 (2+19:06)
 +reboot   system boot  5.10.0-17-amd64  Wed Nov 16 11:18:41 2022 - Tue Dec  6 08:11:01 2022 (19+20:52)
 +reboot   system boot  5.10.0-17-amd64  Mon Sep  5 21:26:07 2022 - Wed Nov 16 11:18:01 2022 (71+14:51)
 +reboot   system boot  5.10.0-16-amd64  Mon Aug 15 05:27:05 2022 - Mon Sep  5 19:36:09 2022 (21+14:09)
 +reboot   system boot  5.10.0-16-amd64  Mon Aug  1 17:56:22 2022 - Mon Aug 15 05:26:20 2022 (13+11:29)
 +...
 +</code>
 +
 +{{tag>["reboot history" "show year" "date format"]}}
 ==== ls and mv ==== ==== ls and mv ====
 Sample command Sample command
linux_notes.1667718494.txt.gz · Last modified: 2022/11/06 07:08 by raju