Originally Posted by bhaskar1967
I am using RHEL 4.0 and my system and when I thpe df it si showing root file system usage is 100% .Please tell me in which directories I should delete the files for my smooth operation.
RHEL 4.0 is really, really old and shouldn't be used any more. Either install a recent RHEL version (assuming you have a paid for subscription) or install a recent CentOS/Scientific Linux version.
About your disk space question: We cannot tell you what needs to be deleted, only you know what is important and what is not.
I would have a look in /var/log and see if there are any old log files that take up too much space and can be deleted.
You can run the following command to see which files are big:
du -ah /var | sort -n -r | head -n 25
The above command looks inside the /var directory and lists the top 25 "big" files.
I already zoomed in to /var, you could also run the above with / instead of /var but that might take a while to run.
For both I would suggest running the commands as root user.