Some of the commands like whereis, cc are not working and also the users can not create a file using
cat > userfile.
How to resolve these problems?

What error messages are you getting?
Is your PATH variable set up correctly?
With regard to users unable to create files:
check if your filesystem is full.

commands whereis and cc shows "not found"
when I login as a user I can not create a file, get message "can not create filename".

I figured out type command as a replacement for whereis.
I changed the umask to 777, 000,... but could not create a file.
My PATH= /bin:/usr/bin:/etc: (hopefully it is correct)
I can create file as superuser meaning filesystem is not full. There are hardly couple of files.

thanks

Try

find / -name cc -print

that should tell you if cc is present anywhere on the system (maybe you have "gcc" installed instead? try that).

With regards to not being able to create files, what does

ls -l .

tell you? Do you have permissions to create files in the directory you are in? Are you in your home directory - can you create files there? Does the file you're trying to redirect "cat" to already exist and you've got "noclobber" set in the shell? (type "set -o" to see what options are set).

Try "touch some_new_filename" and see if that works.

Cheers
ZB

I have figured out the problem associated with the users. The directory you create for users is owned by the SU(root), so you must change its owner and group.
However cc and gcc are still not found. Can you please help me with that?

thanks

hi,
try typing :
$ whereis cc
$ whereis gcc
this should locate these command in your system, if they exist. Otherwise they might not even be installed.