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Navigating File System / Linux filetypes/shaare/wnWuOQ

  • linux
  • linux

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

dr-xr-xr-x
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directories


-rw-r--r--
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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.

8 months ago Permalien
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  • SSH and DNS : SSH ps -ef | grep sshd → check ssh systemctl status sshd DNS PTR record → IP to hostname A record → hostname to IP CNAME record → hostname to...
  • Alias and command history : alias l="ls -al" → define alias unalias l → remove alias Persistent Alias Config User-specific: ~/.bashrc Global: /etc/bashrc Add: alias l="ls -a...
  • 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...
  • Journalctl : journalctl journalctl -u sshd show only log for sshd logger hello write in syslog journalctl -f log is live nano /etc/systemd/journald.c...
  • SED: Stream Editor for Text Manipulation : Basic Replace Syntax: sed -i 's/KENNY/LENNY/g' filename Substitute all occurrences of "KENNY" with "LENNY" Delete Line Containing String: s...


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