Linux File Permissions - adaley0518/Tech_Journal GitHub Wiki

Linux PuTTY file permissions

• Add Users:

  • root directory (sudo -i if not in root directory)
  • useradd (input name)
  • passwd (input name)
  • ls /home (check if users exist)

• Make Directory:

  • mkdir /[directory name]
  • ls -l / (will check if the directory was created)
  • rmdir /[directory name] (will remove directory)

• Make file:

  • touch [filename.txt] (create file)
  • rm [filename] (remove file)

• New Groups/Add Members:

  • root directory
  • groupadd (input group name)
  • usermod -aG [groupname] (user to add to group)

• Change rwx Directory and File permissions:

  • root Directory
  • chmod [who][+,-,=][permission] /directory/filename
    • [who] can be g == group, u == user, o == other/global, a == all
    • [add, remove, same (g=u)]
    • [permission] can be r == read, w == write/modify, x = excute
    • Ex: chmod o-r /management/bobreview.txt
  • ls -ld /directory ( shows the permissions to the file)
  • chgrp name_of_group /directory
    • will change the group name of the directory
  • chown [input user name] /directory/filename (this will change the owner of a file/ will have to change group name as well ^)