Table of contents
1. fdisk -l
The fdisk command is used to manage disk partitions, you can use the fdisk -l command to query disk information; example:
[root@123root]# fdisk -l
Disk /dev/vda: 40 GiB, 42949672960 bytes, 83886080 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: 0x370213b7
Device Boot Start End Sectors Size Id Type
/dev/vda1 * 2048 83886079 83884032 40G 83 Linux
Disk /dev/vdb: 200 GiB, 214748364800 bytes, 419430400 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
2. df -T
The df -T command can display the file type (Type), size (1K-blocks), mount point (Mounted on)
example:
[root@123 root]# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
devtmpfs devtmpfs 7933772 2048 7931724 1% /dev
tmpfs tmpfs 7948088 0 7948088 0% /dev/shm
tmpfs tmpfs 7948088 668 7947420 1% /run
tmpfs tmpfs 7948088 0 7948088 0% /sys/fs/cgroup
/dev/vda1 ext4 41021664 24917404 13990776 65% /
tmpfs tmpfs 7948088 1056 7947032 1% /tmp
/dev/vdb ext3 205376184 89710948 105179476 47% /usr1
tmpfs tmpfs 1589616 0 1589616 0% /run/user/0
tmpfs tmpfs 1589616 0 1589616 0% /run/user/1000
3. blkid
blkid is used to view block device UUID, Label, mount, file system type and other information examples:
[root@123 root]# blkid
/dev/vda1: UUID="dd63185c-f54d-476f-9270-14ad8f9196c6" TYPE="ext4" PARTUUID="370213b7-01"
/dev/vdb: UUID="5cfe7cc7-a335-4fa2-ade9-69c1969f7815" TYPE="ext3"
[root@123 root]# blkid /dev/vdb #查询指定分区/dev/vdb
/dev/vdb: UUID="5cfe7cc7-a335-4fa2-ade9-69c1969f7815" TYPE="ext3"
4. lsblk
lsblk displays in tree form by default, if you want to display in list form: execute lsblk -l.
[root@123 root]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 253:0 0 40G 0 disk
└─vda1 253:1 0 40G 0 part /
vdb 253:16 0 200G 0 disk /usr1
[root@123 root]# lsblk -l
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 253:0 0 40G 0 disk
vda1 253:1 0 40G 0 part /
vdb 253:16 0 200G 0 disk /usr1
The meaning of each parameter:
| name | meaning |
|---|---|
| NAME | block device name |
| MAY: MIN | major and minor device numbers |
| RM | Whether the device is a removable device, 0 is not a removable device |
| SIZE | Capacity |
| RO | Whether it is read-only, 0 means it is not read-only |
| TYPE | Whether the block device is a disk or a partition on a disk |
| MOUNTPOINT | The mount point where the device is mounted, empty means it is not mounted |