Linux Lab 3: Permissions and Man Pages

Authority mappings

Checkpoint 1: Reading Permissions

• 1 ls -l interpretation 5 pts
  Given 5 ls -l lines, identify file type, owner/group/other perms.

Checkpoint 2: chmod Octal

• 1 octal conversion 3 pts
  Convert rwxr-x--- to octal. Convert 644 to rwx.
• 2 chmod octal 3 pts
  chmod 750 file.sh. Then verify with ls -l.

Checkpoint 3: chmod Symbolic

• 1 chmod symbolic 4 pts
  chmod u+x, g-w, o=r on a file. Verify each.

Checkpoint 4: Directory Permissions

• 1 directory x bit 3 pts
  What happens if you remove x from a directory? Test and explain.

Checkpoint 5: Man Pages

• 1 man pages 3 pts
  Look up man chmod. List five options from SYNOPSIS.

Checkpoint 6: --help and which

• 1 --help / which 3 pts
  Compare man ls to ls --help. Use which ls.