Applications closing unexpectedly

[akhtara7]

Hi

I am a linux newbie and just recently when logged in as root and another user one of my applications seems to shut down for no apparent reason.
i double click on the mozilla browser it opens then suddenly it just shuts down straight away. It was working fine upto a week ago but now it fails. The problem was only occuring when i logged in as a standard user but recently the same thing happens in root. Can anyone help?? I am using Linux 8.0 not sure about the kernel though might be 2.6.18

[sasKuatch]

I presume you are using Redhat 8.0?

Let's see if this will reveal anything:

As root, open up a terminal and type in tail -f /var/log/messages
If a program crashes, and you see some mention of error this or that in the terminal, copy the output from the terminal to a new post here. In case you don't know how to copy from a terminal window, you need to select the text with your mouse, and middle-click (or simultaneous left and right click) to paste into another window. Then just post it here so somebody can take a look at that. BTW, /var/log/messages is the system log, it might show what's going on.