lsblk命令用来查看block设备的信息.
主要应用场景: 获取wwnid,获取块设备列表,获取块设备类型(ssd,hdd),获取块设备的size等信息.
数据来源: /sys/dev/block
返回码:
0: success
1: failure
32: 找不到所有指定设备
64: 一些设备找到了,一些设备没找到
复制类似的命令:
findmnt , blkid, ls
复制帮助信息:
➜ ~ lsblk --help
Usage:
lsblk [options] [<device> ...]
List information about block devices.
选项：
-a, --all print all devices
-b, --bytes print SIZE in bytes rather than in human readable format
-d, --nodeps don't print slaves or holders
-D, --discard print discard capabilities
-e, --exclude <list> exclude devices by major number (default: RAM disks)
-f, --fs output info about filesystems
-i, --ascii use ascii characters only
-I, --include <list> show only devices with specified major numbers
-J, --json use JSON output format
-l, --list use list format output
-m, --perms output info about permissions
-n, --noheadings don't print headings
-o, --output <list> output columns
-O, --output-all output all columns
-p, --paths print complete device path
-P, --pairs use key="value" output format
-r, --raw use raw output format
-s, --inverse inverse dependencies
-S, --scsi output info about SCSI devices
-t, --topology output info about topology
-x, --sort <column> sort output by <column>
-h, --help display this help and exit
-V, --version output version information and exit
Available columns (for --output):
NAME device name
KNAME internal kernel device name
MAJ:MIN major:minor device number
FSTYPE filesystem type
MOUNTPOINT where the device is mounted
LABEL filesystem LABEL
UUID filesystem UUID
PARTTYPE partition type UUID
PARTLABEL partition LABEL
PARTUUID partition UUID
PARTFLAGS partition flags
RA read-ahead of the device
RO read-only device
RM removable device
HOTPLUG removable or hotplug device (usb, pcmcia, ...)
MODEL device identifier
SERIAL disk serial number
SIZE size of the device
STATE state of the device
OWNER user name
GROUP group name
MODE device node permissions
ALIGNMENT alignment offset
MIN-IO minimum I/O size
OPT-IO optimal I/O size
PHY-SEC physical sector size
LOG-SEC logical sector size
ROTA rotational device, 0是不可旋转(ssd),1是可旋转(hdd)
SCHED I/O scheduler name
RQ-SIZE request queue size
TYPE device type
DISC-ALN discard alignment offset
DISC-GRAN discard granularity
DISC-MAX discard max bytes
DISC-ZERO discard zeroes data
WSAME write same max bytes
WWN unique storage identifier
RAND adds randomness
PKNAME internal parent kernel device name
HCTL Host:Channel:Target:Lun for SCSI
TRAN device transport type
SUBSYSTEMS de-duplicated chain of subsystems
REV device revision
VENDOR device vendor
复制lsblk 命令输出 default 参数是-a, --all
➜ ~ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
├─sdb2 8:18 0 915M 0 part
└─sdb1 8:17 0 118.4G 0 part
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
├─sde2 8:66 0 1.8T 0 part
└─sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
├─sdc2 8:34 0 372G 0 part /home
├─sdc5 8:37 0 9.5G 0 part [SWAP]
├─sdc3 8:35 0 1K 0 part
└─sdc1 8:33 0 95.4G 0 part /
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -b , --bytes ,输出单位为字节
➜ ~ lsblk -b
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 58478592 1 loop /snap/kata-containers/288
sdd 8:48 0 2000398934016 0 disk
└─sdd1 8:49 0 2000397795328 0 part
sdb 8:16 0 128035676160 0 disk
├─sdb2 8:18 0 959447040 0 part
└─sdb1 8:17 0 127071901696 0 part
loop4 7:4 0 73129984 1 loop /snap/kata-containers/352
sr0 11:0 1 1073741312 0 rom
loop2 7:2 0 93720576 1 loop /snap/core/6818
loop0 7:0 0 92733440 1 loop /snap/core/6964
sde 8:64 0 2000398934016 0 disk
├─sde2 8:66 0 2000263577600 0 part
└─sde1 8:65 0 134217728 0 part
sdc 8:32 0 512110190592 0 disk
├─sdc2 8:34 0 399469707264 0 part /home
├─sdc5 8:37 0 10239344640 0 part [SWAP]
├─sdc3 8:35 0 1024 0 part
└─sdc1 8:33 0 102398689280 0 part /
loop3 7:3 0 93581312 1 loop /snap/core/6673
复制lsblk -D , --discard, 打印discard信息, (没详细查)，针对SSD盘，trim相关
➜ ~ lsblk -D
NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
loop1 0 4K 4G 0
sdd 0 4K 2G 0
└─sdd1 0 4K 2G 0
sdb 0 512B 2G 0
├─sdb2 0 512B 2G 0
└─sdb1 0 512B 2G 0
loop4 0 4K 4G 0
sr0 0 0B 0B 0
loop2 0 4K 4G 0
loop0 0 4K 4G 0
sde 0 0B 0B 0
├─sde2 0 0B 0B 0
└─sde1 0 0B 0B 0
sdc 0 512B 2G 0
├─sdc2 0 512B 2G 0
├─sdc5 0 512B 2G 0
├─sdc3 0 512B 2G 0
└─sdc1 0 512B 2G 0
loop3 0 4K 4G 0
复制DISC-GRAN DISC-MAX 非0说明支持fstrim
lsblk -d [/dev/sdx], --nodeps ,打印指定设备的信息,或者打印所有设备的信息
➜ ~ lsblk -d
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
sdb 8:16 0 119.2G 0 disk
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
sdc 8:32 0 477G 0 disk
loop3 7:3 0 89.3M 1 loop /snap/core/6673
➜ ~ lsblk -d /dev/sdc
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdc 8:32 0 477G 0 disk
复制lsblk -e, --exclude list , 排除major id列表
➜ ~ lsblk -e 7
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
├─sdb2 8:18 0 915M 0 part
└─sdb1 8:17 0 118.4G 0 part
sr0 11:0 1 1024M 0 rom
sde 8:64 0 1.8T 0 disk
├─sde2 8:66 0 1.8T 0 part
└─sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
├─sdc2 8:34 0 372G 0 part /home
├─sdc5 8:37 0 9.5G 0 part [SWAP]
├─sdc3 8:35 0 1K 0 part
└─sdc1 8:33 0 95.4G 0 part /
➜ ~ lsblk -e 7,8
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
复制lsblk -f, --fs , 输出设备的文件系统信息
同lsblk -o NAME,FSTYPE,LABEL,UUID,MOUNTPOINT
➜ ~ lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT loop1 squashfs /snap/kata-containers/288 sdd └─sdd1 ntfs Volume2 CA9015A6901599D1 sdb ├─sdb2 ntfs 30EAC3FEEAC3BE7A └─sdb1 ntfs OS_WIN10 0600EC5800EC4FEB loop4 squashfs /snap/kata-containers/352 sr0 loop2 squashfs /snap/core/6818 loop0 squashfs /snap/core/6964 sde ├─sde2 ntfs 专用存储 B6D47A52D47A1539 └─sde1 sdc ├─sdc2 ext4 53842090-4ad6-4472-ad35-53b4d7b33bf8 /home ├─sdc5 swap 382e4b22-503e-4911-bf2f-1167af3f3cda [SWAP] ├─sdc3 └─sdc1 ext4 6b5618d0-a2b0-41f3-a3a5-9eb5a524b0a8 / loop3 squashfs /snap/core/6673复制
lsblk -I , --include list ,打印major id列表
➜ ~ lsblk -I 7,8
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
├─sdb2 8:18 0 915M 0 part
└─sdb1 8:17 0 118.4G 0 part
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
├─sde2 8:66 0 1.8T 0 part
└─sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
├─sdc2 8:34 0 372G 0 part /home
├─sdc5 8:37 0 9.5G 0 part [SWAP]
├─sdc3 8:35 0 1K 0 part
└─sdc1 8:33 0 95.4G 0 part /
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -i , --ascii ,将输出信息的字符用ascii码打印
➜ ~ lsblk -i
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
`-sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
|-sdb2 8:18 0 915M 0 part
`-sdb1 8:17 0 118.4G 0 part
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
|-sde2 8:66 0 1.8T 0 part
`-sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
|-sdc2 8:34 0 372G 0 part /home
|-sdc5 8:37 0 9.5G 0 part [SWAP]
|-sdc3 8:35 0 1K 0 part
`-sdc1 8:33 0 95.4G 0 part /
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -J , --json 用json格式输出
➜ ~ lsblk -J
{
"blockdevices": [
{"name": "loop1", "maj:min": "7:1", "rm": "0", "size": "55.8M", "ro": "1", "type": "loop", "mountpoint": "/snap/kata-containers/288"},
{"name": "sdd", "maj:min": "8:48", "rm": "0", "size": "1.8T", "ro": "0", "type": "disk", "mountpoint": null,
"children": [
{"name": "sdd1", "maj:min": "8:49", "rm": "0", "size": "1.8T", "ro": "0", "type": "part", "mountpoint": null}
]
},
{"name": "sdb", "maj:min": "8:16", "rm": "0", "size": "119.2G", "ro": "0", "type": "disk", "mountpoint": null,
"children": [
{"name": "sdb2", "maj:min": "8:18", "rm": "0", "size": "915M", "ro": "0", "type": "part", "mountpoint": null},
{"name": "sdb1", "maj:min": "8:17", "rm": "0", "size": "118.4G", "ro": "0", "type": "part", "mountpoint": null}
]
},
{"name": "loop4", "maj:min": "7:4", "rm": "0", "size": "69.8M", "ro": "1", "type": "loop", "mountpoint": "/snap/kata-containers/352"},
{"name": "sr0", "maj:min": "11:0", "rm": "1", "size": "1024M", "ro": "0", "type": "rom", "mountpoint": null},
{"name": "loop2", "maj:min": "7:2", "rm": "0", "size": "89.4M", "ro": "1", "type": "loop", "mountpoint": "/snap/core/6818"},
{"name": "loop0", "maj:min": "7:0", "rm": "0", "size": "88.4M", "ro": "1", "type": "loop", "mountpoint": "/snap/core/6964"},
{"name": "sde", "maj:min": "8:64", "rm": "0", "size": "1.8T", "ro": "0", "type": "disk", "mountpoint": null,
"children": [
{"name": "sde2", "maj:min": "8:66", "rm": "0", "size": "1.8T", "ro": "0", "type": "part", "mountpoint": null},
{"name": "sde1", "maj:min": "8:65", "rm": "0", "size": "128M", "ro": "0", "type": "part", "mountpoint": null}
]
},
{"name": "sdc", "maj:min": "8:32", "rm": "0", "size": "477G", "ro": "0", "type": "disk", "mountpoint": null,
"children": [
{"name": "sdc2", "maj:min": "8:34", "rm": "0", "size": "372G", "ro": "0", "type": "part", "mountpoint": "/home"},
{"name": "sdc5", "maj:min": "8:37", "rm": "0", "size": "9.5G", "ro": "0", "type": "part", "mountpoint": "[SWAP]"},
{"name": "sdc3", "maj:min": "8:35", "rm": "0", "size": "1K", "ro": "0", "type": "part", "mountpoint": null},
{"name": "sdc1", "maj:min": "8:33", "rm": "0", "size": "95.4G", "ro": "0", "type": "part", "mountpoint": "/"}
]
},
{"name": "loop3", "maj:min": "7:3", "rm": "0", "size": "89.3M", "ro": "1", "type": "loop", "mountpoint": "/snap/core/6673"}
]
}
复制lsblk -l, --list , 打印一个表格格式的输出
➜ ~ lsblk -l
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
sdb2 8:18 0 915M 0 part
sdb1 8:17 0 118.4G 0 part
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
sde2 8:66 0 1.8T 0 part
sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
sdc2 8:34 0 372G 0 part /home
sdc5 8:37 0 9.5G 0 part [SWAP]
sdc3 8:35 0 1K 0 part
sdc1 8:33 0 95.4G 0 part /
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -m, --perms , 输出设备的权限,属主属组信息
同lsblk -o NAME,SIZE,OWNER,GROUP,MODE
➜ ~ lsblk -m
NAME SIZE OWNER GROUP MODE
loop1 55.8M root disk brw-rw----
sdd 1.8T root disk brw-rw----
└─sdd1 1.8T root disk brw-rw----
sdb 119.2G root disk brw-rw----
├─sdb2 915M root disk brw-rw----
└─sdb1 118.4G root disk brw-rw----
loop4 69.8M root disk brw-rw----
sr0 1024M root cdrom brw-rw----
loop2 89.4M root disk brw-rw----
loop0 88.4M root disk brw-rw----
sde 1.8T root disk brw-rw----
├─sde2 1.8T root disk brw-rw----
└─sde1 128M root disk brw-rw----
sdc 477G root disk brw-rw----
├─sdc2 372G root disk brw-rw----
├─sdc5 9.5G root disk brw-rw----
├─sdc3 1K root disk brw-rw----
└─sdc1 95.4G root disk brw-rw----
loop3 89.3M root disk brw-rw----
复制lsblk -n, --noheadings, 不打印标题
➜ ~ lsblk -n
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
sdb 8:16 0 119.2G 0 disk
├─sdb2 8:18 0 915M 0 part
└─sdb1 8:17 0 118.4G 0 part
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
├─sde2 8:66 0 1.8T 0 part
└─sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
├─sdc2 8:34 0 372G 0 part /home
├─sdc5 8:37 0 9.5G 0 part [SWAP]
├─sdc3 8:35 0 1K 0 part
└─sdc1 8:33 0 95.4G 0 part /
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -o , --output list, 打印指定字段细腻系,
或者lsblk -o +UUID, 表示在默认输出的后边加一列字段名为UUID的信息
➜ ~ lsblk -o +UUID
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT UUID
loop1 7:1 0 55.8M 1 loop /snap/kata-containers/288
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part CA9015A6901599D1
sdb 8:16 0 119.2G 0 disk
├─sdb2 8:18 0 915M 0 part 30EAC3FEEAC3BE7A
└─sdb1 8:17 0 118.4G 0 part 0600EC5800EC4FEB
loop4 7:4 0 69.8M 1 loop /snap/kata-containers/352
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.4M 1 loop /snap/core/6818
loop0 7:0 0 88.4M 1 loop /snap/core/6964
sde 8:64 0 1.8T 0 disk
├─sde2 8:66 0 1.8T 0 part B6D47A52D47A1539
└─sde1 8:65 0 128M 0 part
sdc 8:32 0 477G 0 disk
├─sdc2 8:34 0 372G 0 part /home 53842090-4ad6-4472-ad35-53b4d7b33bf8
├─sdc5 8:37 0 9.5G 0 part [SWAP] 382e4b22-503e-4911-bf2f-1167af3f3cda
├─sdc3 8:35 0 1K 0 part
└─sdc1 8:33 0 95.4G 0 part / 6b5618d0-a2b0-41f3-a3a5-9eb5a524b0a8
loop3 7:3 0 89.3M 1 loop /snap/core/6673
复制lsblk -O, --output-all,输出所有列的信息
➜ ~ lsblk -O
NAME KNAME MAJ:MIN FSTYPE MOUNTPOINT LABEL UUID PARTTYPE PARTLABEL PARTUUID PARTFLAGS RA RO RM HOTPLUG MODEL SERIAL SIZE STATE OWNER GROUP MODE ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED RQ-SIZE TYPE DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO WSAME WWN RAND PKNAME HCTL TRAN SUBSYSTEMS REV VENDOR
loop1 loop1 7:1 squashfs /snap/kata 128 1 0 0 55.8M root disk brw-rw---- 0 512 0 512 512 1 none 128 loop 0 4K 4G 0 0B 0 block
sdd sdd 8:48 128 0 0 0 ST2000DM0 WFL10Z4B 1.8T runni root disk brw-rw---- 0 4096 0 4096 512 1 cfq 128 disk 0 4K 2G 0 0B 0x5000c500be0e12fc 1 2:0:0:0 sata block:scsi:pci
│ 0001 ATA
└─sdd1 sdd1 8:49 ntfs Volume2 CA9015A6901599D1 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 Basic data partition
fbbcfa40-06d8-4d43-9b2e-18b04089e30d 128 0 0 0 1.8T root disk brw-rw---- 0 4096 0 4096 512 1 cfq 128 part 0 4K 2G 0 0B 0x5000c500be0e12fc 1 sdd block:scsi:pci
sdb sdb 8:16 128 0 0 0 M4-CT128M 000000001 119.2G runni root disk brw-rw---- 0 512 0 512 512 0 cfq 128 disk 0 512B 2G 0 0B 0x500a075109112598 0 0:0:0:0 sata block:scsi:pci
│ 000F ATA
├─sdb2 sdb2 8:18 ntfs 30EAC3FEEAC3BE7A 0x27 4051264b-02 128 0 0 0 915M root disk brw-rw---- 0 512 0 512 512 0 cfq 128 part 0 512B 2G 0 0B 0x500a075109112598 0 sdb block:scsi:pci
│
└─sdb1 sdb1 8:17 ntfs OS_WIN10 0600EC5800EC4FEB 0x7 4051264b-01 0x80 128 0 0 0 118.4G root disk brw-rw---- 0 512 0 512 512 0 cfq 128 part 0 512B 2G 0 0B 0x500a075109112598 0 sdb block:scsi:pci
loop4 loop4 7:4 squashfs /snap/kata 128 1 0 0 69.8M root disk brw-rw---- 0 512 0 512 512 1 none 128 loop 0 4K 4G 0 0B 0 block
sr0 sr0 11:0 128 0 1 1 DRW-24D3S KSTD3N812 1024M runni root cdrom brw-rw---- 0 512 0 512 512 1 cfq 128 rom 0 0B 0B 0 0B 0x5001480000000000 1 5:0:0:0 sata block:scsi:pci
1.01 ASUS
loop2 loop2 7:2 squashfs /snap/core 128 1 0 0 89.4M root disk brw-rw---- 0 512 0 512 512 1 none 128 loop 0 4K 4G 0 0B 0 block
loop0 loop0 7:0 squashfs /snap/core 128 1 0 0 88.4M root disk brw-rw---- 0 512 0 512 512 1 none 128 loop 0 4K 4G 0 0B 0 block
sde sde 8:64 128 0 0 0 WDC WD20E WD-WCC4ML 1.8T runni root disk brw-rw---- 0 4096 0 4096 512 1 cfq 128 disk 0 0B 0B 0 0B 0x50014ee2b52d7844 1 4:0:0:0 sata block:scsi:pci
│ 0A80 ATA
├─sde2 sde2 8:66 ntfs 专用存储 B6D47A52D47A1539 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 Basic data partition
│ 42732d06-bb6d-4e0c-80fc-5e2746300ea7 128 0