rm: cannot remove `'<dir>'//Updates/zzipfile': Read-only file system
rm: cannot remove `'<dir>'//utils': Read-only file system
rm: cannot remove ``<dir>'//version': Read-only file system
rm: cannot remove ``<dir>'//xml': Read-only file system
rm: cannot remove ``<dir>'//.oem': Read-only file system

From the error message: 'Read-only file system'

the rm command does attempt to modify the file system which is why this fails.

Either the whole directory/file system is mounted read only in which case it would need to be mounted read write to be modified, assuming the media is writeable.

or

These are read-only file systems mounted below the directory you're trying to remove, and will need to be unmounted using the umount command before you can remove the directory.

Yikes!!!

"rm -rf" does not unmount a filesystem - it removes files and directories.

However it can NOT remove "read only" files. The fact your message says you have filesystems rather than just files means you have to unmount those filesystems before removing the files in the directory.

If in fact you want to remove all the files/directories then you FIRST need to unmount the filesystems then do the rm.

The question is WHY are you trying to remove all files?

Also if you are in fact removing the files and do the unmount you need to be sure you get rid of the mounts in /etc/fstab (or automounter) if you're mounting that way so they don't attempt to remount on reboot.

Type below command and check whether you had mounted filesystem.If you find mounted ,umount the filesystem and then try to remove the directory

#mount

THis is the ISO image of Application I installed and now I wanted to remove it. The ISO was extracted to /tmp/commvault....
SO am trying to remove this to free space using rm -rf /tmp/commvaultinstall/.
Here is the result of mount command
unmount gives error

#mount
.
.
.
nfsd on /proc/fs/nfsd type nfsd (rw)
/tmp/Disk 3.iso on /tmp/commvaultinstall type iso9660 (rw,loop=/dev/loop0)


#unmount /tmp/commvaultinstall/
-bash: unmount: command not found

try umount rather than unmount.

THanks Fredrick.

umount worked and was able to delete the concerned folder.

Is "umount" used in Linux instead of "unmount"?

Yes - and in UNIX.