andrew.z.savva@xxxxxxxxxxxx wrote:
Hi,
I recently upgraded a fedora core 3 machine to FC6 and have a serious
problem getting it to function correctly.
On boot up many of the services complain about missing shared
libraries, e.g. libssl, libdl.so, etc. However, the system continues
on and gets to a (text based) login prompt. I log in on the console
and none of the commands work. I try simple commands like "ls", "w",
"ifconfig", "init" and it complains about missing libc.so and other
really fundamental system libraries.
However what is really strange is that I rebooted into single user
mode (i.e. run level 1) and I can log in okay and I can run the above
commands as normal! I checked to see if the libraries exist on the
disk and everything is perfectly fine. In fact I managed to get a
crippled system running from run level 1 and successfully got a
network running and started services like postfix, asterisk and httpd
without any problems.
If I enter run level 3 or 5 then nothing is accessible from root or
through an ordinary user account. I tried various methods of login in
including ssh, sftp, etc and each time I am told that the shared
library doesn't exist. I did a bit of poking around in run level 3 and
although I cannot "ls" the shared library files (because "ls" doesn't
work) I can still cd /lib and I can use filename completion to show
the files. Then I decided to try run on and I found that running a
shared library presents you with information about the lib, e.g.
version, GNU licence, etc (that's the first time I knew you could do
that so that was something I learnt). This proves that the libraries
do exist and they are accessible from run level 1.
I tried both a Selinux kernel (the one from FC6) and my original
2.6.18.1 kernel (without selinux) and both exhibit the same behaviour.
When I booted into the selinux kernel the filesystem was relabelled by
selinux as expected.
What I don't understand is that selinux is turned off in
/etc/sysconfig/selinux and I've never enabled it on my FC3 machine so
I don't know why it is broken. I checked through the log files and I
don't see any mention of any selinux problems or any reports from
selinux but I still thought it might be a selinux related issue.
It's certainly the strangest problem I've ever encountered on Linux.
It seems to me like the system is denying access to files and that's
what led me to believe it might be a selinux related issue and as I've
never used it before I thought it was a likely candidate.
Also I upgraded three other machines (admittedly running different
flavours of FC) and ran into no problems in the upgrade. One
significant difference between them was that the FC3 machine had
selinux installed (but disabled) on it.
I would really appreciate some help because I'm usually able to fix
any Linux issue and this one has got me stumped. I have completely
lost access to my machine and to make matters worse it is a remote
machine and I only get access to it at the weekends!
Thanks in advance,
Andrew.
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Boot single user mode
touch /.autorelabel
reboot
Which should fix the labeleing on the system so you can run with SELInux on.
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