Linux File Permissions - morgan-hanrahan/Tech-Journal GitHub Wiki

Add Users and Groups

• To add users use: useradd [name]
  • make sure to add a password for the user using: passwd [user]
• To add a new group use: groupadd [groupname]
  • Adding a user to a group use: usermod -aG [groupname] [user]

Editing the File Permissions

• To impersonate another user: su - [user]
• To change the group of a directory use: chgrp [groupname] [filename/directory]
• File permissions are easy to read:
  • The first '-' indicates the file type
  • The next three '---' are the user permissions (u)
  • The next three '---' after that are the group permissions (g)
  • The last three '---' are others permissions (o)
    • r = read
    • w = write
    • x = execute
• To edit permission simply do: chmod [g, u, or, o][+ or -][rwx]
• To make an owner do: chown [user] [filename]