There can be many reasons for lockups, bad disk sectors, lack of ram, poor X-windows configuration...
Most log files are located in the /var/log/ directory.
If you open up a terminal window and get a command line, enter
tail -f /var/log/messages
This will allow you to view the log messages as they are printed.
Set the window full size and the Mozilla window half height so you can read the new lines as they appear in the bottom of the screen...
Another file to watch is
tail -f /var/log/XFree86.0.log
which lists information from the X-Windows server...
You can have many terminal windows open at a time...
Ctrl-Alt-Del is used to reboot the system...
Ctrl-Esc will give you the running software and info...
It appears the "security Setting" tool is broken. enter
netstat -anp
to get a list of servers listening for connections. Maybe for the moment "High" security is appropriate...
You can decide which servers you want running and which to turn off...
chkconfig --list
service ~~~ stop
chkconfig ~~~ off
RH8 has some good documentation online ..
http://www.redhat.com/docs/manuals/l...HL-8.0-Manual/