Intro to Linux

File System Structure

• Root directory
  • /boot, /usr, /etc, /home, /dev, /var
  • Under /usr would be:
    • /bin, /lib, /include
  • Under /home there would be:
    • /usernames and within them directories for the Desktop, Downloads, etc.

Basic Linux Commands

• File & Folder
  • ls - List directory contents or file info
  • cd - Change current directory
  • mkdir - Make directory
  • rmdir - Delete directory
  • cp - Copy
  • rm - Remove
  • pwd - Print working directory
  • touch - Change timestamps or create empty files
  • cat - Display file contents
• Compression
  • tar - Create an archive
• File permission and ownership
  • chmod - Change permissions
  • chown - Change owner
• Network
  • ping - Network test
  • whois - DNS information
  • ip - ifconfig basically
• Process Management
  • ps - Process status viewer
  • top - CPU Information
• System Information
  • date - Display system date and time
  • uptime - Find out how long system is active
  • whoami - Find out current user
• Redirection Operators
  • | - Output serves as input to next in the pipeline
  • ">" - Overwrite a file
  • ">>" - Append a file
• Superuser
  • sudo - Use sudoer privilege
  • su - Switch from one account to the other or to just root