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shellfilesystemsmount

Shell script to know whether a filesystem is already mounted

I have a tmpfs file system mounted on a particular directory. I want to write a shell script to check whether the tmpfs filesystem is already mounted on the directory.

Solution

  • You can check the type of the filesystem.

    $ stat -f -c '%T' /
xfs
$ stat -f -c '%T' /dev/shm
tmpfs

    You could also check whether a directory is a mountpoint by comparing its device with its parent's.

    $ stat -c '%D' /
901
$ stat -c '%D' /home
fe01
$ stat -c '%D' /home/$USER
fe01