Linux File Permissions Game

Change file permissions: chmod 755 filename
Make file executable: chmod +x filename
Remove write permission for others: chmod o-w filename
Set specific owner and group: chown user:group filename
Check file permissions: ls -l filename
Make a directory only accessible by the owner: chmod 700 dirname
Give group ownership to 'staff': chown :staff filename
Set a file to read-only for all users: chmod 444 filename
Make all shell scripts in a folder executable: chmod +x *.sh
Copy permissions from another file: chmod --reference=example.txt file.txt