I am working on a server with Debian 5.2.2. Barely having any administrative knowledge with Linux, I think I screwed something up. I used apt-get update and apt-get upgrade to get everything up to date and then I downloaded and installed Apache, PHP, and MySQL. Those tools seem to work fine, but now I can't even login to the server EXCEPT via local console. If I try to login via the GUI or if I try to login remotely via ssh, scp, or anything else, I get disconnected IMMEDIATELY upon successful login. In other words, it has no problem with the initial connection, but when I put in the correct username and password (for root or any user), I get disconnected. With the GUI, the screen goes black for a second and then puts me right back to the login prompt. With ssh, I get "connection to [server] closed." I tried WinSCP and I get "Connection has been unexpectedly closed. Server sent command exit status 254."
Any help is appreciated, and if there is any way I could give more information, please let me know. Thank you for your time.
-- Any user can login on the local console
-- At the moment I don't have local access to the machine, so all I can do right now is ssh. Here is the output of ssh -vvv [server] after I enter my password:
Linux xxxxxxx.com 188.8.131.52+20091222+1056-debhawk-5.2.2-custom #1 SMP PREEMPT Tue Dec 22 10:58:57 EST 2009 i686 Last login: Mon Apr 30 14:48:07 2012 from xxxxxxx.com debug2: channel 0: rcvd eof debug2: channel 0: output open -> drain debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug2: channel 0: rcvd close debug2: channel 0: close_read debug2: channel 0: input open -> closed debug3: channel 0: will not send data after close debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1) debug3: channel 0: close_fds r -1 w -1 e 6 Connection to xxx.x.xx.xx closed. debug1: Transferred: stdin 0, stdout 0, stderr 35 bytes in 0.0 seconds debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 3845.3 debug1: Exit status 254