Thanks EG for that timely reply. Using EG's advice, I re-installed apache-perl, apache-common, libc6 and any other libraries ldd shows apache depends upon. I also installed libc6-dbg in hopes of watching apache execute and seeing where it fails. But so far, none of these have proved directly beneficial to making apache come up.
Here is what happened: Last night we had a storm so I unplugged all the computers. They were working fine when I shut them down. This morning, after I restarted them, I tried to connect to the webserver only to discover it was not running at all. /usr/sbin/apache -X replies "Segmentation Fault". Replacing all the files needed to start the webserver seems as though it would have corrected any problems in regard to a corrupted filesystem. At one time I had trouble with this machine segfaulting when running Java - I corrected this by removing the L2 Cache and have not had any trouble with it since. Prior to lastnight, it had been running fine for about 15 days. Any ideas on where to go from here? Regards, Elizabeth