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mknod - Man Page

make block or character special files

Examples (TL;DR)




Create the special file NAME of the given TYPE.

Mandatory arguments to long options are mandatory for short options too.

-m,  --mode=MODE

set file permission bits to MODE, not a=rw - umask


set the SELinux security context to default type


like -Z, or if CTX is specified then set the SELinux or SMACK security context to CTX


display this help and exit


output version information and exit

Both MAJOR and MINOR must be specified when TYPE is b, c, or u, and they must be omitted when TYPE is p.  If MAJOR or MINOR begins with 0x or 0X, it is interpreted as hexadecimal; otherwise, if it begins with 0, as octal; otherwise, as decimal.  TYPE may be:


create a block (buffered) special file

c, u

create a character (unbuffered) special file


create a FIFO

Your shell may have its own version of mknod, which usually supersedes the version described here.  Please refer to your shell's documentation for details about the options it supports.


Written by David MacKenzie.

Reporting Bugs

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

See Also


Full documentation <https://www.gnu.org/software/coreutils/mknod>
or available locally via: info '(coreutils) mknod invocation'

Referenced By

buffindexed.conf(5), cycbuff.conf(5), fd(4), full(4), hd(4), hier(7), initrd(4), intro(4), ioctl_console(2), lp(4), mem(4), mknod(2), null(4), perlipc(1), ram(4), random(4), tty(4), ttyS(4).

July 2024 GNU coreutils 9.5