综合比较可知， blkid 命令是最可靠的获取方式。

root@ubuntu:~# blkid 
/dev/sda1: UUID="05c72939-7771-405b-a417-3d2e9e34c3b7" TYPE="ext4" 
/dev/sda5: UUID="7c9bd388-581b-49f3-996f-8d4c26932739" TYPE="swap" 
/dev/sdb1: LABEL="BOOT" UUID="68AB-85A4" TYPE="vfat" 
/dev/sdb2: LABEL="ROOTFS" UUID="2c884457-40a0-4d3e-9681-e866bcec34b2" TYPE="ext3" 
root@ubuntu:~# 
root@ubuntu:~# e2label /dev/sdb2 
ROOTFS
root@ubuntu:~# e2label /dev/sdb1
e2label: Bad magic number in super-block 当尝试打开 /dev/sdb1 时
找不到有效的文件系统超级块.
root@ubuntu:~# 
root@ubuntu:~# tune2fs -l /dev/sdb2
tune2fs 1.41.11 (14-Mar-2010)
Filesystem volume name:   ROOTFS
Last mounted on:          /media/video/ROOTFS
Filesystem UUID:          2c884457-40a0-4d3e-9681-e866bcec34b2
Filesystem magic number:  0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              435024
Block count:              1736704
Reserved block count:     86834
Free blocks:              1458029
Free inodes:              418691
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      423
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8208
Inode blocks per group:   513
Filesystem created:       Thu Mar 23 18:42:23 2017
Last mount time:          Mon Nov  6 13:51:59 2017
Last write time:          Mon Nov  6 13:51:59 2017
Mount count:              62
Maximum mount count:      -1
Last checked:             Thu Mar 23 18:42:23 2017
Check interval:           0 (<none>)
Lifetime writes:          882 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:           256
required extra isize:     28
Desired extra isize:      28
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      e9e08be3-d7ea-47dd-b9d5-efeb56e744fc
Journal backup:           inode blocks
root@ubuntu:~# 

配合 awk 或者 cut 命令 提取LABEL

root@ubuntu:~# 
root@ubuntu:~# blkid /dev/sdb2 | awk -F " " '{print $2}' | awk -F "\"" '{print $2}'
ROOTFS
root@ubuntu:~# blkid /dev/sdb1 | awk -F " " '{print $2}' | awk -F "\"" '{print $2}'
BOOT
root@ubuntu:~# 
root@ubuntu:~# blkid /dev/sdb2 | cut -d " " -f 2
LABEL="ROOTFS"
root@ubuntu:~# blkid /dev/sdb2 | cut -d " " -f 2 | cut -d "\"" -f 2 
ROOTFS
root@ubuntu:~# blkid /dev/sdb1 | cut -d " " -f 2 | cut -d "\"" -f 2 
BOOT
root@ubuntu:~# blkid /dev/sda1 | cut -d " " -f 2 | cut -d "\"" -f 2 
05c72939-7771-405b-a417-3d2e9e34c3b7

root@ubuntu:~# blkid /dev/sdb1 | cut -d "LABEL=" -f 2
cut: 分界符必须是单个字符
请尝试执行"cut --help"来获取更多信息。

root@ubuntu:~# blkid /dev/sdb1 | awk -F "LABEL=" '{print $2}' 
"BOOT" UUID="68AB-85A4" TYPE="vfat" 
root@ubuntu:~# 
root@ubuntu:~# blkid /dev/sdb1 | awk -F "LABEL=" '{print $2}' | awk -F "\"" '{print $2}'
BOOT
root@ubuntu:~# blkid /dev/sda1 | awk -F "LABEL=" '{print $2}' | awk -F "\"" '{print $2}'

root@ubuntu:~#