Distro:
Centos 4.4 (similar to Red Hat Enterprise) with Oracle database
Hardware:
Dell Optiplex GX240 1.7 Ghz Pentium 763 Mb RAM
Symptoms:
Machine was running, I was connected remotely over home network, then I got a segmentation fault while working in SQLPlus. Remote session became unresponsive, logged out. Shut down machine from power switch. Restarted several days later, machine came up fine, Oracle database started fine, started grepping for string "segmentation" in /var/log and did not find errors. Looked at /var/log/message and /var/log/message.1 and did not find references to my troubles of the other day. Connected remotely and started going to database alert log to look for records of troubles there and got

[centos1:bob:/u01/app/oracle/admin/bob/bdump]\ $ ls -ltr
-bash: /bin/ls: Input/output error

Went to console and found keyboard had gone unresponsive and although the mouse was responsive, I couldn't get the icons to work in their normal manner.

I sent this to "Security" because I am suspecting something bad has taken up residence on this machine. I'm sending this email from my iMac and have disconnected the suspect machine from my network. I have another Linux machine with the same distro on the network and it's working fine (tho I have powered it down, too).

My thought is that I might just put the install disk in and wipe the machine, but I thought I'd pose this question first.

Thanks in advance

OK. See if the instructions at the Intruder Detection Checklist (CERT): http://www.cert.org/tech_tips/intrud...checklist.html can help you get any signs of (perceived) malicious activity and post what you find.

Thanks! I'll do that. I'm going to be away from this site for a month, so the reply will be delayed.

If I ctl-alt-f2 to the command line, it's throwing EXT3-fs error messages like crazy. If I shut down and then restart later (maybe after it cools?) it'll go through the same cycle. If I reboot right away I get a lot of I/O errors at boot and a failure.

I think it's a bad hard drive and I am hosed on this ol' machine.

Boot into knoppix or something of the sorts and test the hdd.