command

Set input style

vim

set -o vi

emacs

set -o emacs

Change User Group

sudo chown -R $USER:$GROUP .

Note

-R: Recursively change the owner and group of all files in the current directory.

Change Permissions

a directory must have execute permission to list its contents.

use numbers

chmod 755 file

Note

• 7: rwx
• 6: rw
• 5: rx
• 4: r
• 3: wx
• 2: w
• 1: x
• 0: None

use symbols

chmod u+x file

Note

• u: User
• g: Group
• o: Others
• a: All
• +: Add
• -: Remove
• x: Execute
• r: Read
• w: Write