UNIX/LINUX Command – mknod


mknod—Make special files


mknod [options] filename {bcu} major minor
mknod [options] filename p


[–m mode] [–mode=mode] [–help] [–version]


This manual page documents the GNU version of mknod. mknod creates a FIFO, character special file, or block special file with the given filename. By default, the mode of created files is 0666 minus the bits set in the umask.

The argument after filename specifies the type of file to make:
p for a FIFO
b for a block (buffered) special file
c or u for a character (unbuffered) special file

When making a block or character special file, the major and minor device numbers must be given after the file type.


Options Description
–m, –mode mode Set the mode of created files to mode, which is symbolic as in chmod and uses the default mode as the point of departure.
–help Print a usage message on standard output and exit successfully.
–version Print version information on standard output then exit successfully.

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