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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.



mknod

mknod [options] name type [major minor]

Create a special file (a file that can send or receive data). Special files can be character files (read one character at a time), block files (read several characters at a time), or FIFO pipes (see mkfifo).

To choose which type of device to create, use one of the following arguments:

p

Create a FIFO file (named pipe). You do not need to specify the major and minor device numbers.

b

Create a block file. You must specify the major and minor device numbers the file represents.

c or u

Create a character file. You must specify the major and minor device numbers the file represents.

Linux's /dev/MAKEDEV utility is useful for creating one or more devices of a given type in a single command.

Options

--help

Print usage information and exit.

-m mode, --mode=mode

Set the file mode of the device, as with chmod. The default mode is a=rw unless you have chosen other settings via umask.

--version

Print version information and exit.