---
name: "mlock"
section: "1"
platform: "linux"
package: "mlock"
version: "8:2007f~dfsg-7+b2"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/mlock"
---

# mlock(1)

## NAME

mlock -- lock a mailbox

## SYNOPSIS

/usr/bin/mlock

## DESCRIPTION

If **libc-client.so** is unable to create a mailbox lock file, it will call this program.  This makes using the mailbox safe over i.e. NFS. There is no reason to call **mlock** yourself or through another program.  It is setgid mail so there is no need to change the permissions of */var/mail* to 1777.

## BUGS

No documentation other than this crappy man page,

## AUTHOR

mlock was written by Mark Crispin \<mrc@cac.washington.edu\> This man page was written for Debian GNU/Linux by Jaldhar H. Vyas \<jaldhar@debian.org\>