Linux

System's Manual Pager: `man`

List Files: `ls` 

ls # list files in current directory
ls -l # detailed listing w/ perimissions
ls -la # show hidden files
ls -lh # human-readable file sizes
ls -lt # sort by modification time

CLI for Package Management System: `apt`

  • intended as an end user interface and enables some options
    • better suited for interactive usage by default
      • compared to more specialized APT tools
        • like apt-get and apt-cache