Linux Commands

File Operations

• Create a symbolic link (shorcut): ln -s /path/to/target ~/shortcut_name
• Change file or directory permissions:
  • Make a file executable: chmod +x <file_name>
  • Set full permissions (read/write/execute for everyone - use with caution): chmod 777 <file_name>

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System & Binaries

• Check shared library dependencies of a program: ldd <file_name>

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Process Management

• List all running processes:
  • Resource focused (BSD style): ps aux
    • (Best for checking %CPU, %MEM, and memory usage)
  • Hierarchy focused (System V style): ps -ef
    • (Best for seeing PPID/Parent-Child relationships)
• Kill a process:
  • Force kill (sends SIGKILL, process cannot clean up): kill -9 <PID>
• Send a specific signal (e.g., Signal 10/SIGUSR1): kill -s 10 <PID> or kill -SIGUSR1 <PID> or kill -USR1 <PID>

• List all available signal types: kill -l

• View manual for the kill command: man kill