Others - wwangdev/wwangdev.github.io GitHub Wiki

#Shell Basic Command -- Others

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Need to know

• ".tar.gz": gzip format zip file

Package Management

• apt: apt-get, apt-cache
  • apt-get: install, update, upgrade, remove, source, clean.
  • apt-cache: search, depends

Pack Files

• pack: tar -cvf shell.tar shell/
  • -c: create
  • -v: verbose
  • -f: named file
  • -w: permission file by file
  • -z: use gzip to zip file
• unpack: tar -xvf shell.tar shell/
  • -x: unpack

User Management

• sudo useradd -m XXX: add a user XXX and create home directory, then use sudo passwd XXX to setup password
• useradd -g: mark group of new user (not frequently used)
• history N: list command history in bash of recent N
• sudo userdel -r XXX: delete user XXX and also delete the home directory of XXX
• usermod:
  • -d: modify home directory
  • -e: effective date (MM/DD/YY)
  • -g: modify group
  • -l: modify user name
  • -s: modify default shell

Process Control

• ps -aux | less
• ps -lax | less: includes PPID and NI
• top: realtime process monitor
• lsof XXX: XXX is currently used by which process
• kill XXX: try to kill a process
• sudo kill -KILL pid: force kill
• nice -n num XXX: increase nice level of num to XXX. No -n means 10. (nice level: -20 ~ +19)
• renice num -p XXX: set nice value of pid:xxx to num
• nice: list nice value