Finding a Drives Name in Linux From the Command Line

There are a few different ways to find out a drives(sdcard, usb drive, external hard drive) name.

One way to do it is to look at dmesg. Insert your drive and then run the command. It displays a lot of info, what we are interested in is the end which should say something about your drive.

dmesg
[ 4443.109976] mmc0: new high speed SDHC card at address aaaa
[ 4443.111857] mmcblk0: mmc0:aaaa SU04G 3.69 GiB 
[ 4443.120836]  mmcblk0: p1 p2
[ 4453.045338] EXT4-fs (mmcblk0p2): recovery complete
[ 4453.086165] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 4453.086184] SELinux: initialized (dev mmcblk0p2, type ext4), uses xattr

This tells us that the device is mmcblk0. The “p2” at the end is the partition number.

Another way to do it is to run the df command.
Run the below command without your drive plugged in.

df -h

it’ll return something like this

Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/fedora-root   50G   12G   36G  24% /
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G  600K  1.9G   1% /dev/shm
tmpfs                    1.9G  1.0M  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs                    1.9G   28K  1.9G   1% /tmp
/dev/sdb1                477M  115M  333M  26% /boot
/dev/mapper/fedora-home   76G   45G   23G  87% /home

The above command returns all the partitions that are mounted on your computer.
Now mount your drive and run the command again, it should show your drive at the bottom.

[me@fedora ~]$ df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/fedora-root   50G   12G   36G  24% /
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G  600K  1.9G   1% /dev/shm
tmpfs                    1.9G  1.1M  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs                    1.9G   28K  1.9G   1% /tmp
/dev/sdb1                477M  115M  333M  26% /boot
/dev/mapper/fedora-home   76G   45G   23G  87% /home
/dev/mmcblk0p2           3.6G  2.3G  1.1G  69% /run/media/me/fc522c75-9sws

You can see that the bottom one “/dev/mmcblk0p2 ” is the partition of the drive you just plugged in.

You can also use fdisk.

sudo fdisk -l

It will return something similar to the following.

Disk /dev/mapper/fedora-home: 78.8 GiB, 191931351040 bytes, 374865920 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk /dev/mmcblk0: 3.7 GiB, 3965190144 bytes, 7744512 sectors

The bottom section is the drive “mmcblk0”.

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