How to check the number of partitions in a Linux system

How to check the number of partitions in the Linux system

In the Linux system, we can check the number of partitions that already exist in the system through commands. Checking the number of partitions is very important for system management and monitoring, and can help us better understand the storage structure and usage of the system.

The following is the specific method to check the number of partitions in a Linux system, as well as the corresponding code examples:

1. Use the fdisk command to check the number of partitions

fdisk It is a command line tool used to manage disk partitions and is very commonly used in Linux systems. We can use the fdisk command to view the number of partitions that exist in the system.

sudo fdisk -l

Output result example:

Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1  *        2048  2097151  2095104    1G 83 Linux
/dev/sda2        2097152 20971519 18874368  9G  8e Linux LVM

In this example, we can see two partitions that already exist in the system: /dev/sda1 and /dev/sda2.

2. Use the lsblk command to check the number of partitions

lsblk is a command line tool used to list block device information and can also be used to view the number of partitions in the system.

sudo lsblk

Output result example:

NAME          MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda             8:0    0   10G  0 disk
|-sda1          8:1    0    1G  0 part /
|-sda2          8:2    0    9G  0 part /mnt

In this example, you can also see the two partitions that already exist in the system: sda1 and sda2.

Through the above two methods, we can easily check the number of partitions in the Linux system to better understand the storage structure and usage of the system. This is very helpful for system management and monitoring.

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