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I did a search for both:
Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed!
and
WARNING: Cannot write log file: /var/log/squid3/cache.log
/var/log/squid3/cache.log: Permission denied
There are plenty of other posts with related issues...It may take a bit of work to locate the underlying problem.
Describing your system would make a solution easier to find. Especially "Kernel Version" "Desktop Environment" at least.
Have you searched the archives for sqiud3 packages that might be missing from your system?
Also, do you need sudo for some particular reason? I'll bet you already have su installed......
In memory of Ian Ashley Murdock (1973 - 2015) founder of the Debian project.
The problem is that now things are owned by root that shouldn't be, unfortunately I'm not aware of any easy way to fix all the permissions/ownership on a debian system after making a screwup like this.
For the one related to processing triggers for man-db try
chown -R man /usr/share/man
For the squid and mysql ones you will need to figure out yourself what those daemons are running as and what they are trying and failing to acesss, good luck.
Wow a lot or responses leading to different things.
Okay, so I am actually liking the idea of a fresh install. My system is Debian Lenny, I have no desktop, all command line (for a learning experience). When I changed all groups to Lamez, it was like for a second, I did one reboot and started to notice errors. Those errors I posted are a few, I fixed the SSH problem (I did not post that).
Thanks for all the help, I thought there would be a quick fix, but oh well. I am just going to grab my net-install disk, print out my setup tutorial (I wrote), and give this another stab.
This will allow me to setup Squid correctly the first time, RADIUS correctly. Thanks Guys.