[Cialug] Spontaneous Outbreak of Read-Only-ness

[Todd Walton]

I've had two weird read-only-izings happen in the past 24 hours.

First, a RHEL 6 box: Found I couldn't write files to /tmp, even as root.
Further poking revealed that I couldn't write to / either. 'cat
/proc/mounts' said / was rw. Changing SELinux to permissive didn't help.
Rebooted. All is well.

Then, a CentOS 6 box: Tried to update root password. It took the password
twice and then said "passwd: Authentication token manipulation error". I
tried to mv the shadow file, thinking maybe I'd re-shadow passwd, but it
wouldn't let me move it because... read-only filesystem. Again, 'cat
/proc/mounts' showed that that should not have been the case. I rebooted
and all is now well.

I can't troubleshoot these further right now because I made the problem go
away. But anybody seen this before?

--
Todd