Linux lsblk Command Tutorial For Beginners

1. What is the Lsblk command in Linux?
2. What is difference between Lsblk and DF?
3. How check Lsblk Linux?
4. What is the output of Lsblk?
5. How do I install Lsblk?
6. How do I know if my hard drive is SSD Linux?
7. How do I expand a filesystem in Linux?
8. How do I see all devices on Linux?
9. How do I find my device name in Linux?
10. How do I list all USB devices in Linux?
11. What are block devices in Linux?
12. What shows are on Lsblk?
13. What is Blk in Linux?

What is the Lsblk command in Linux?

lsblk lists information about all or the specified block devices. The lsblk command reads the sysfs filesystem to gather information. The command prints all block devices (except RAM disks) in a tree-like format by default. Use lsblk --help to get a list of all available columns.

What is difference between Lsblk and DF?

lsblk lists all mass storage devices and partitions on them, including mounted file systems, unmounted file systems and devices without any file system. df 'reports file system disk space usage', which means that it lists mounted file systems and also file systems in RAM.

How check Lsblk Linux?

lsblk(8) — Linux manual page

1. NAME top. lsblk - list block devices.
2. SYNOPSIS top. lsblk [options] [device...]
3. DESCRIPTION top. lsblk lists information about all available or the specified block devices. ...
4. OPTIONS top. -a, --all Also list empty devices and RAM disk devices. ...
5. EXIT STATUS top. ...
6. ENVIRONMENT top. ...
7. NOTES top. ...
8. AUTHORS top.

What is the output of Lsblk?

sr0 is your optical device, i.e. the dvd drive. There is a 1 under the RM because it is a removable drive. It has a 0 under the RO column because it is not a read-only device. It is of type rom because it is not a disk, but a DVD/CD-ROM device, i.e., an optical device.

How do I install Lsblk?

lsblk is available in distribution official repository so, we can easily install through distribution package manager. For Debian/Ubuntu , use apt-get command or apt command to install lsblk. For RHEL/CentOS , use YUM command to install lsblk. For Fedora , use dnf command to install lsblk.

How do I know if my hard drive is SSD Linux?

If you wish to know if HDD connected to your server is SSD (Solid State Drive) OR a normal HDD, you can simply login to your server via SSH & execute below command. You should get 1 for normal HDD & 0 for a SSD (Solid State Drive). Linux automatically detected the SSD (Solid State Drive) with kernel 2.6. 29 and later.

How do I expand a filesystem in Linux?

Option 2

1. Check if disk is available: dmesg | grep sdb.
2. Check if disk is mounted: df -h | grep sdb.
3. Ensure there are no other partitions on disk: fdisk -l /dev/sdb. ...
4. Resize the last partition: fdisk /dev/sdb. ...
5. Verify the partition: fsck /dev/sdb.
6. Resize the filesystem: resize2fs /dev/sdb3.

How do I see all devices on Linux?

The best way to list anything in Linux is to remember the following ls commands:

1. ls: List files in the file system.
2. lsblk: List block devices (for example, the drives).
3. lspci: List PCI devices.
4. lsusb: List USB devices.
5. lsdev: List all devices.

How do I find my device name in Linux?

The procedure to find the computer name on Linux:

1. Open a command-line terminal app (select Applications > Accessories > Terminal), and then type:
2. hostname. hostnamectl. cat /proc/sys/kernel/hostname.
3. Press [Enter] key.

How do I list all USB devices in Linux?

The widely used lsusb command can be used to list all the connected USB devices in Linux.

1. $ lsusb.
2. $ dmesg.
3. $ dmesg | less.
4. $ usb-devices.
5. $ lsblk.
6. $ sudo blkid.
7. $ sudo fdisk -l.

What are block devices in Linux?

Block devices are characterized by random access to data organized in fixed-size blocks. Examples of such devices are hard drives, CD-ROM drives, RAM disks, etc. ... To simplify work with block devices, the Linux kernel provides an entire subsystem called the block I/O (or block layer) subsystem.

What shows are on Lsblk?

Lsblk, The column MOUNTPOINT:

The column MOUNTPOINT shows the mount point of each device or partition, the next image shows the partitions of the device sda. The screenshot below shows an efi partition belonging to sda1, the encrypted sda2 root partition, the sda3 for boot and an encrypted sda4 SWAP.

What is Blk in Linux?

Lsblk is used to display details about block devices and these block devices(Except ram disk) are basically those files that represent devices connected to the pc. It queries /sys virtual file system and udev db to obtain information that it displays. And it basically displays output in a tree-like structure.