On Friday 24 June 2016 00:51:53 Steven D'Aprano wrote:

> On Fri, Jun 24, 2016 at 12:22:18AM -0400, Gene Heskett wrote:
> > But why should a powerdown as unceremonious as pulling the plug,
> > have deleted /usr/bin/X?  It doesn't grok at this site.
>
> File system corruption?

Doubtfull. Two drives currently mounted, / is ext4, and /amandatapes is 
ext3.

> What file system do you have? If it is something with a journal (ext4,
> for example) I would be surprised. If it is something experimental or
> less reliable (btfs, reiserfs?) then I wouldn't be surprised.

I have 3 sshfs mounts of other computers, but given the power outages, 
they could not have been mounted as thats in my /etc/rc.local and only 
mounted when this machine is rebooted. I may have had up to 3 ssh -Y 
sessions that wasn't in active use at the time of the ups shutdown.
>
> All file systems can lose data if you interrupt them while updating
> the file system, but some are more resiliant than others. I tend to
> prefer the good old ext3 or ext4 standby over flashier, faster but
> less resiliant newer file systems, and older, unjournaled file systems
> like ext2.

So do I, after a 2 install foray into reiserfs long before it was ready 
for everyday use. At least a decade back.  And I need to see what it 
takes to convert the ext3 amanda uses to ext4.  That just shows how long 
I have been using amanda. It was ext2 only back in the late 90's. :)

> Have a look inside /lost+found (assuming /usr/bin is in the /
> partition) and see if there's anything there. You may find all your X
> files, and more, given generic names. Or you may find nothing at all.

Its empty on both drives.  So I am scratching my head yet.

Thanks.

Cheers, Gene Heskett
-- 
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Genes Web page <http://geneslinuxbox.net:6309/gene>