by Anish
Posted on Friday December 21
By default, the mount command displays a list of media devices currently mounted on the system:
$ sudo mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=2002872k,nr_inodes=500718,mode=755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
/dev/vda1 on /boot type ext2 (rw,relatime,block_validity,barrier,user_xattr,acl)
/dev/mapper/ubuntu--vg-root on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
.....
.....
The mount command provides four information:
The basic mount option
mount -t type device directory
Windows Device type
| OS | File Systems |
|---|---|
| Windows | vfat,ntfs,iso9660 |
Linux Device type
lsblk displays block devices
$ lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
vda
vda1 ext2 eb311fb6-841d-4220-9994-046ff3b46721 /boot
vda2
vda5 LVM2_member Gx5XbE-coCx-2c9e-XuP3-qD7T-R8GR-0k0nwV
ubuntu--vg-root ext4 e2a78946-d108-438c-ac8c-4b003f74ae64 /
ubuntu--vg-swap_1 swap 710191d7-7abd-4fb7-b4d9-eae243cd6077 [SWAP]
To mount the USB memory stick at device /dev/sdb1 at location /media/disk, you use the following command:
mount -t vfat /dev/sdb1 /media/disk
To mount the CDROM at device /dev/cdrom at location /mnt/disk, you use the following command:
mount /dev/cdrom /mnt/cdrom
mount Command options
| Parameter | Description |
|---|---|
| -a | All the filesystems listed via getfsent(3) are mounted |
| -d | Causes everything to be done except for the actual system call |
| -f | Causes the mount command to simulate mounting a device, but not actually mount it |
| -s | Ignores mount options not supported by the filesystem |
| -o | async,force,noasync,noauto,nodev,noexec,noowners,nosuid,rdonly,sync,update,union,noatime,nobrowse mount -t hfs -o nosuid,-w,-m=755 /dev/disk2s9 /tmp |
| -r | Mount the file system read-only |
mounts all filesystems except those of type NFS and HFS.
mount -a -t nonfs,hfs
mounts NFS share
mount -t nfs ip_address:/dirname /mnt/localdiskname
To remove a removable media device, you should never just remove it from the system. Instead, you should always unmount it first
umount [directory | device ]
To unmount the data directory
sudo umount /data
If any program has a fi le open on a device, the system won't let you unmount it.
$ umount /data
umount: /data: device is busy
umount: /data: device is busy
SSHFS is Linux based software that needs to be installed on your local computer
sudo mkdir /data
sudo chown user:group /data
sudo sshfs -o allow_other,defer_permissions root@:/ /mnt/data
or for Key Based
sudo sshfs -o allow_other,defer_permissions,IdentityFile=~/.ssh/id_rsa root@:/ /mnt/data
A mount point is "just" a directory. So all you need to do is to create a directory, then mount it, the only tricky part is the device name which you are mounting
mkdir /data
chown user:group /data
mount /dev/sdb1 /data
IDE controller naming convention
| drive name | drive controller | drive number |
| /dev/hda | 1 | 1 |
| /dev/hdb | 1 | 2 |
| /dev/hdc | 2 | 1 |
| /dev/hdd | 2 | 2 |
partition names
| drive name | drive controller | drive number | partition type | partition number |
| /dev/hda1 | 1 | 1 | primary | 1 |
| /dev/hda2 | 1 | 1 | primary | 2 |
| /dev/hda3 | 1 | 1 | primary | 3 |
| /dev/hda4 | 1 | 1 | swap | NA |
| /dev/hdb1 | 1 | 2 | primary | 1 |
| /dev/hdb2 | 1 | 2 | primary | 2 |
| /dev/hdb3 | 1 | 2 | primary | 3 |
| /dev/hdb4 | 1 | 2 | primary | 4 |
SCSI Drives
| drive name | drive controller | drive number | partition type | partition number |
| /dev/sda1 | 1 | 6 | primary | 1 |
| /dev/sda2 | 1 | 6 | primary | 2 |
| /dev/sda3 | 1 | 6 | primary | 3 |
Next Reading : How to Monitoring All Executed Commands in Linux
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