Ran into an issue today where Apache would not load because
/var/run/httpd was missing. After much hunting to find that cause of the error I was getting (
[Tue Jul 25 00:06:31.574386 2017] [auth_digest:error] [pid 6179] (2)No such file or directory: AH01760: failed to initialize shm - all nonce-count checking, one-time nonces, and MD5-sess algorithm disabled).
Then I saw that MariaDB was missing its
/var/run/mysql directory, and PostgreSQL was missing its directory.
What would cause those to not be made on system start-up / saved between reboots?
I would not expect to need to modify init scripts as suggested in this question.
Edit: outputs of
ls -dl /var/run &
ls -dl /run
lrwxrwxrwx. 1 root root 6 Dec 15 2015 /var/run -> ../run drwxr-xr-x 25 root root 800 Jul 26 03:40 /run