Essential Linux Commands for Software Developers

Discover the power of three essential Linux commands: “ls” (listing files and directories), “cd” (navigating through directories), and “chmod” (managing file permissions). Mastering these commands is crucial for efficient software development in Linux environments. Enhance your productivity and streamline your workflow with this concise guide to essential Linux commands.

1. Exploring Directories and Files
   • The “ls” Command
     • $ ls: Lists files and directories in the current directory.
     • $ ls alx/: Lists files and directories in the “alx” directory.
     • $ ls -la: Lists files and directories in long format, including hidden files.
   • Understanding File Permissions
     • File Listing Structure:
       • First column: Type of file & permissions
         • -: File
         • d: Directory
         • l: Symbolic link
       • Permissions:
         • r: Read
         • w: Write
         • x: Execute
         • -: No permission
2. Navigating through Directories
   • Absolute Path Name
     • $ cd /: Changes to the root directory.
     • $ cd ~: Changes to the home directory.
   • Relative Path Name
     • $ cd -: Changes to the previous directory.
3. Managing File Permissions with “chmod”
   • Symbolic Mode
     • +: Gives permission
     • -: Removes permission
     • =: Sets permission
     • Example: chmod o+w: Gives write permission to others.
   • Absolute Mode
     • u: User/owner
     • g: Group
     • o: Others/rest
     • +: Gives permission
     • -: Removes permission
     • Example: chmod o+w: Gives write permission to others.