Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

mknod(8) [bsd man page]

MKNOD(8)						      System Manager's Manual							  MKNOD(8)

NAME
mknod - build special file SYNOPSIS
/sbin/mknod name [ c ] [ b ] major minor DESCRIPTION
Mknod makes a special file. The first argument is the name of the entry. The second is b if the special file is block-type (disks, tape) or c if it is character-type (other devices). The last two arguments are numbers specifying the major device type and the minor device (e.g. unit, drive, or line number). The assignment of major device numbers is specific to each system. They have to be dug out of the system source file conf.c. SEE ALSO
mknod(2), makedev(8) 4th Berkeley Distribution November 16, 1996 MKNOD(8)

Check Out this Related Man Page

MKNOD(8)						    BSD System Manager's Manual 						  MKNOD(8)

NAME
mknod -- make device special file SYNOPSIS
mknod [-F format] name [c | b] major minor [-F format] name [c | b] major unit subunit name [c | b] number name [p] DESCRIPTION
The mknod command creates device special files. Normally the shell script /dev/MAKEDEV is used to create special files for commonly known devices; it executes mknod with the appropriate arguments and can make all the files required for the device. To make nodes manually, the required arguments are: name Device name, for example ``sd'' for a SCSI disk on an HP300 or a ``pty'' for pseudo-devices. b | c | p Type of device. If the device is a block type device such as a tape or disk drive which needs both cooked and raw special files, the type is b. All other devices are character type devices, such as terminal and pseudo devices, and are type c. To create named pipes the type p can be used. major The major device number is an integer number which tells the kernel which device driver entry point to use. To learn what major device number to use for a particular device, check the file /dev/MAKEDEV to see if the device is known, or check the system depen- dent device configuration file: ``/usr/src/sys/conf/device.architecture'' (for example device.hp300). minor The minor device number tells the kernel which one of several similar devices the node corresponds to; for example, it may be a spe- cific serial port or pty. unit and subunit The unit and subunit numbers select a subset of a device; for example, the unit may specify a particular SCSI disk, and the subunit a partition on that disk. (Currently this form of specification is only supported by the bsdos format, for compatibility with the BSD/OS mknod(8) .) Device numbers for different operating systems may be packed in a different format. To create device nodes that may be used by such an oper- ating system (e.g. in an exported file system used for netbooting), the -F option is used. The following formats are recognized: native, 386bsd, 4bsd, bsdos, freebsd, hpux, isc, linux, netbsd, osf1, sco, solaris, sunos, svr3, svr4 and ultrix. Alternatively, a single opaque device number may be specified. SEE ALSO
mkfifo(1), mkfifo(2), mknod(2), MAKEDEV(8) HISTORY
A mknod command appeared in Version 6 AT&T UNIX. The -F option appeared in NetBSD 1.4. NetBSD 1.4 September 11, 1998 NetBSD 1.4
Man Page

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

mknod

Can someone please tell me what the command mknod does and what it's syntax is? I can't find it in my "Unix for dummies" book or "Unix in s nutshell". I found it in an existing script that I want to copy, but I want to understand what I am doing. The script is going to do a full export of an... (3 Replies)
Discussion started by: bemeeks
3 Replies

2. Programming

mknod system call to clone /dev/null

I'm trying to use the "mknod" call in C to create a clone of /dev/null. I am stumped as to the final parameter I should provide to "mknod()". I am supposed to give it a type dev_t, which specifies a major & minor number. I want to specify major 3, minor 1, but how can I do this? dev_t seems to... (2 Replies)
Discussion started by: nathan
2 Replies

3. Solaris

Help:NFS mknod failed

this is existing issue for this nfs client, which mounts windows exported file system, and this is only one UNIX box has this problem, other boxes are fine. Here is from messages file. Jan 24 03:11:10 venus nfs: NFS mknod failed for server arc: error 2 (RPC: Can't decode result) Jan... (0 Replies)
Discussion started by: steeles
0 Replies

4. HP-UX

Mknod

Hey guys i dont quite understand mknod, can anyone explain it to me and what is its purpose in LVM. (4 Replies)
Discussion started by: sbn
4 Replies

5. UNIX for Dummies Questions & Answers

Info regarding mknod -p

Hello All, Friends i know mknod with -p option is used to create FIFO special file.:p But i want to know some circumstance/scenario where these are used.:wall: Actually i want to know where i can use it in real time. Please advise.:) (3 Replies)
Discussion started by: Bibhudatta
3 Replies

6. AIX

What is mknod file present in /etc folder in AIX server used for ?

Hi Guys, On my AIX server , I have this file "mknod" present in the /etc/ directory. When i try opening it , I dont find any ascii characters. It shows some encryption/binary format which is not readable. Is it any executable ? what is the purpose of having this file in etc folder? what if... (2 Replies)
Discussion started by: DBTuner
2 Replies

7. Shell Programming and Scripting

Backingup larger files with TAR command

I need to backup my database but the files are very large and the TAR command will not let me. I searched aids and found that I could do something with the mknod, COMPRESS and TAR command using them together. I appreciate your help. (10 Replies)
Discussion started by: frizcala
10 Replies

Featured Tech Videos