Use the umountall command to unmount a group of file systems. You can use the following options with the umountall command:
Runs the fuser –k mount-point command to kill any processes that are associated with the mount-point
Indicates that unmount is not to be performed in parallel
Specifies that only local file systems are to be used
Specifies that only remote file systems are to be used
Specifies that all file systems from the named host should be unmounted. You cannot combine the –h option with –l or –r.
The following example unmounts all file systems that are mounted from remote hosts:
# umountall -r
The following example unmounts all file systems that are currently mounted from the server bee:
# umountall -h bee