Linux Useful Commands

Linux_DebugNotes_03

• sudo: Super User Do
  • sudo -i: Switch to root user
• apt-get: Advanced Packaging Tool
  • sudo apt-get update: Update software list
  • sudo apt-get upgrade: Upgrade software
  • sudo apt-get install <package>: Install package
  • sudo apt-get remove <package>: Remove package
  • sudo apt-get autoremove: Remove unused packages
  • sudo apt-get clean: Clean cache
  • sudo apt-get autoclean: Clean cache and unused packages
  • sudo apt-get purge <package>: Remove package and configuration files
• dpkg: Debian Package
  • sudo dpkg -i <package>: Install package
  • sudo dpkg -r <package>: Remove package
• File manipulation:
  • ls: List files
    • ls -a: List all files including hidden files
    • ls -l: List files in detail
  • cd: Change directory
    • cd ..: Go to parent directory
    • cd ~: Go to home directory
    • cd -: Go to previous directory
  • pwd: Print working directory
  • mkdir: Make directory
    • Syntax: mkdir dir1 dir2 dir3
  • touch: Create file
    • Syntax: touch file1 file2 file3
  • cp: Copy file
    • cp -r: Copy directory
    • syntax: cp <source> <destination>
  • mv: Move file
    • mv -r: Move directory
    • mv <old_name> <new_name>: Rename file
    • mv <file> <directory>: Move file to directory
  • rm: Remove file
    • rm -r: Remove directory
    • rm -f: Force remove
    • rm -rf: Force remove directory
• chmod: Change mode
  • chmod 777 <file>: Give all permissions to file
• &&: Logical AND
  • command1 && command2: Execute command2 if command1 is successful
• -y: Yes
  • sudo apt-get install -y <package>: Install package without asking
• |: Pipe
  • command1 | command2: Pipe the output of command1 to command2
• grep: Global Regular Expression Print
  • ls -l | grep <pattern>: Search for pattern in output of ls -l

Strongly recommend the Missing Semester course from MIT. It is a very good course for learning Linux and shell Link. My notes for this course can be found here.

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