Chmod 4100

Chmod 4100 (chmod a+rwx,u-rw,g-rwx,o-rwx,ug+s,+t,g-s,-t) sets permissions so that, (U)ser / owner can't read, can't write and can execute. (G)roup can't 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 4100 folder_name
OR use the symbolic CHMOD Command:

chmod -R a+rwx,u-rw,g-rwx,o-rwx,ug+s,+t,g-s,-t folder_name

Chmod Permissions for chmod 4100

Chmod owner

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

Chmod group

  • Group can't 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 4100 looks in file listing

For files

After changing a file's mode to 4100 the file's mode will be displayed in Unix style file lsting as: ---s------

For folders

After changing a directory's mode to 4100 the folder's mode will be displayed in Unix style file lsting as: d--s------