What creates /run/lock?

Question

I have found that it lacks /run/lock directory.

And I cannot find out what daemon/init script creates it.

Could you give me a hint?

Just to make it clear:

1.

# mount
/var/lib/vz/private/101 on / type simfs (rw,relatime)
/dev/sdb on /var/lib/mysql type ext4 (rw,noatime,relatime,barrier=1,data=ordered)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,mode=600,ptmxmode=000)
varrun on /run type tmpfs (rw,relatime)

2.

# ls -la /run/l*
ls: cannot access /run/l*: No such file or directory

score 1 · Answer 1 · edited Apr 13 '17 at 12:24

1

/run/lock used to be /var/lock.

It should be cleaned up or recreated during the boot process, for Ubuntu I am not sure which script does it.

However, I know for LFS the /etc/rc.d/init.d/cleanfs script does the job => http://www.linuxfromscratch.org/lfs/view/stable/scripts/apds12.html

Some background:

/var/run => /run is in memory filesystem (tmpfs) used for storing temporary system or state files (e.g. PID, Unix socket, etc...) that do NOT require persistence across reboots.

see => What are "/run/lock" and "/run/shm" used for?

To manually create / mount

sudo mkdir -p /run
sudo chmod 755 /run
sudo mount -t tmpfs -o rw,noexec,nosuid,size=10%,mode=0755 tmpfs /run

BTW: some off-topic stuff about tmpfs VS ramfs

tmpfs swaps out to disk but ramfs does NOT
tmpfs has fixed size (specified) but ramfs does NOT (you can keep writing even exceeds the max size)

edited Apr 13 '17 at 12:24

Community

1

answered Sep 19 '13 at 06:06

Terry Wang

9,775

And what daemon creates it? My question is: it lacks on one machine, how would I fix it. – zerkms Sep 19 '13 at 06:08
Well, I need to create it back without reboot for obvious reasons :-) – zerkms Sep 19 '13 at 06:14
You can manually mount it anyway. Will update the answer. – Terry Wang Sep 19 '13 at 06:15

zerkms · Accepted Answer · 2013-09-19T07:56:55.133

0

Well, I could remount it using plain old

mount -o remount /run/lock

and it's defined in /lib/init/fstab

edited Sep 19 '13 at 07:56

answered Sep 19 '13 at 06:21

zerkms

1,472

1

You will probably need sudo to be able to that command. This answer doesn'ät answer the first question, "What creates /run/lock?" ... – Alvar Sep 19 '13 at 06:28
@Alvar: is it better now? – zerkms Sep 19 '13 at 07:57

What creates /run/lock?

2 Answers2