CHMOD Calculator

Chmod 4000

Chmod 4000 (chmod a-rwx,ug+s,+t,g-s,-t) sets permissions so that, (U)ser / owner can't read, can't write and can't 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 − − −

Special bits

Setuid 4000 Setgid 2000 Sticky Bit 1000

Extra chmod command options

Output

Modifiers

Octal CHMOD command

$ chmod -R 4000 folder_name

Symbolic CHMOD command

$ chmod -R a-rwx,ug+s,+t,g-s,-t folder_name

Chmod Permissions for chmod 4000

Chmod owner

  • Owner can't read
  • Owner can't write
  • Owner can't 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 4000 looks in file listing

For files

After changing a file's mode to 4000, the file appears as:

- --S------

For folders

After changing a directory's mode to 4000, the folder appears as:

d --S------