192 reputation
110
bio website whathesaid.ca
location Yukon Territory, Canada
age 46
visits member for 5 years, 3 months
seen Mar 27 at 17:11
Techie, Teachie, North of 60°

Feb
18
accepted Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?
Feb
17
comment Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?
Thanks for the advice. The math should work out like this: 8TB of physical disk under RAID6 gives you 6TB useable, which was split into 3 volumes of 2TB each (and actually a 60GB leftover fourth volume). I think I may just try what you suggest and see if I run into trouble.
Feb
17
asked Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?
Dec
20
awarded  Popular Question
Apr
13
awarded  Popular Question
Sep
14
comment What could have caused all non-root accounts to lose basic file and directory permissions?
Good idea. I didn't notice if the sticky bit was set or not. But would that prevent non-root account CLI logins? I wouldn't have thought that /tmp would be needed for something that simple. And would it also explain why Apache suddenly stopped serving pages with a 403 Forbidden?
Sep
9
comment What could have caused all non-root accounts to lose basic file and directory permissions?
I have a feeling you might be right, but I kinda hope not because that means I would have no control over it happening again, and no way to fix it other than through a support call. I'll double-check with Slicehost to see if anything noteworthy happened at their end. Strange that I could start over with a fresh image and then cause the problem again (seemingly during the mysql-server install).
Sep
8
revised What could have caused all non-root accounts to lose basic file and directory permissions?
Note about it not being a current problem.
Sep
8
comment What could have caused all non-root accounts to lose basic file and directory permissions?
No, that wasn't it, although now I'm curious just what would happen if two accounts shared an UID. This problem seemed to have shut down all non-root account simultaneously. I wouldn't think that would happen if just two of them had the same UID.
Sep
8
comment What could have caused all non-root accounts to lose basic file and directory permissions?
The problem may well be related to Slicehost's Xen setup, but it was strange that it seemed to occur both times during the MySQL installation. I checked and nothing was mounted RO after the problem occurred, and there was still plenty of disc space. I was still merrily installing stuff as root the first time it happened. I do suspect that you're right about a kernel issue -- but a reboot (many, actually) didn't fix the problem.
Sep
7
awarded  Promoter
Sep
7
revised What could have caused all non-root accounts to lose basic file and directory permissions?
Mention of bounty.
Sep
7
comment What could have caused all non-root accounts to lose basic file and directory permissions?
@Gilles: turns out you can't actually run SELinux or AppArmor on a Slicehost virtual server without special help from the admins, so I don't think I could've done it accidentally.
Sep
5
comment What could have caused all non-root accounts to lose basic file and directory permissions?
I had checked the mount as well, but it was read-write. In fact, I had been installing other packages as root during this time without noticing the problem. It was only the non-root accounts that had the problem (which wouldn't have been the case for a ro filesystem).
Sep
4
comment What could have caused all non-root accounts to lose basic file and directory permissions?
@Gilles: no, not that I know of. I'll look into those though and see if they provide any hints on what happened. Thanks for the tip.
Sep
4
comment What could have caused all non-root accounts to lose basic file and directory permissions?
I wondered about that myself, and looked through .bash_history just in case, but didn't find anything. All of the ownerships and permissions of the /home, /tmp, and /var/www directories appeared correct and yet the login, mysql-server install, and apache processes all seemed to fail simultaneously with permission-related errors. Even chmod-ing directory permissions to 777 didn't fix anything, so I figure the problem must've gone even deeper. It's a puzzler.
Sep
4
comment What could have caused all non-root accounts to lose basic file and directory permissions?
Sorry, no. I foolishly didn't keep a copy of the directory permissions, but I checked them over and over and over and even chmod-ed the /home and /home/yukondude directories to 777 to see if it made any difference -- nope.
Sep
4
answered How to scan for which ports would be open to another location
Sep
4
asked What could have caused all non-root accounts to lose basic file and directory permissions?
Sep
2
comment My iptables script is blocking incoming/outgoing DNS
If you really want to sink your teeth into netfilter/iptables, here's the definitive guide: frozentux.net/iptables-tutorial/chunkyhtml Might be overkill in this case though.