Mount You Must Specify The Filesystem Type in Linux
February 16 2015
If you may received an error when you mount external hard disk, mount you must specify the filesystem type.
You have to specify the file system type " -t FILESYSTEMTYPE " (ext2, ext3, ext4, 4dev, msdos, vfat) argument to the command,
Find out current file system types by command,
# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda2 ext4 226784652 6491384 208773268 4% /
tmpfs tmpfs 445616 232 445384 1% /dev/shm
/dev/sda1 ext4 99150 57181 36849 61% /boot
/dev/sda5 ext4 14250928 12136220 1390792 90% /home
/dev/sda6 ext4 8063408 532164 7121644 7% /tmp
List out and check your file disk using fdisk command,
# fdisk -l
Now, create a directory and mount file system /dev/sdb2 to /thelinuxfaq,
# mkdir /thelinuxfaq
# mount -t ext4 /dev/sdb2 /thelinuxfaq
# mount -t ext4 /dev/sdb2 /thelinuxfaq
Once executed the above command check the directory,
# cd /thelinuxfaq
Unmount Device
Unmount your device,
# umount /dev/sda2
or
# umount /thelinuxfaq
Error :
umount: /thelinuxfaq: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
Solution:
This error generated due to you are currently working in files, come out from that device
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