Web Hosting

Chmod 4240

Chmod 4240 (chmod a+rwx,u-rx,g-wx,o-rwx,ug+s,+t,g-s,-t) sets permissions so that, (U)ser / owner can't read, can write and can't execute. (G)roup can read, can't write and can't execute. (O)thers can't read, can't write and can't execute.

Owner Rights (u) Group Rights (g) Others Rights (o)
Read (4)
Write (2)
Execute (1)
Extra chmod command options







Use the octal CHMOD Command:

chmod -R 4240 folder_name
OR use the symbolic CHMOD Command:

chmod -R a+rwx,u-rx,g-wx,o-rwx,ug+s,+t,g-s,-t folder_name
Web Hosting

Chmod Permissions for chmod 4240

Chmod owner

  • Owner can't read
  • Owner can write
  • Owner can't execute

Chmod group

  • Group can read
  • Group can't write
  • Group can't execute

Chmod other

  • Others can't read
  • Others can't write
  • Others can't execute

How chmod 4240 looks in file listing

For files

After changing a file's mode to 4240 the file's mode will be displayed in Unix style file lsting as: --wSr-----

For folders

After changing a directory's mode to 4240 the folder's mode will be displayed in Unix style file lsting as: d-wSr-----