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Navigating File System / Linux filetypes/shaare/MUuvKg

  • linux
  • linux

  • ls -l → List
  • pwd → Print working directory

dr-xr-xr-x
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directories


-rw-r--r--
|
file


Linux File Types

Symbol Type
- Regular file
d Directory
l Link
c Special file or device file
s Socket → Network communication / process data between external processes
p Named pipe → FIFO → First In First Out, data between internal processes
b Block device

Inode = Pointer or number of a file on a hard disk.

7 months ago Permalink
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  • Special Permissions (SetUID, SetGID, Sticky Bit) : chmod u+s xyz.sh → add SetUID (user-level special permission) chmod g+s xyz.sh → add SetGID (group-level special permission) chmod u-s xyz.sh → remov...
  • Disk usage, logging, shutdown, hostname : Disk and Memory Info df → disk partition info df -h → human-readable format du → size of file/directory free → memory info cat /proc/cpuinfo → CPU in...
  • Shell Scripting Basics : First Line of Script #!/bin/bash → defines the shell interpreter Comments Use # for commenting Common Elements Commands: echo, cp, etc. Statement...
  • Alias Setup : alias l="ls -al" → define alias unalias l → remove alias Persistent Alias Config User-specific: ~/.bashrc Global: /etc/bashrc Add: alias l="ls -a...
  • Crontab / at : Crontab Basics crontab -e → edit crontab crontab -l → list crontab entries crontab -r → remove crontab entries systemctl status crond → check crond s...


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