tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
r 命令 /path/to/somefile :在指定位置把另一个文件的内容插入进来。
# sed '/^UUID/r /etc/issue' /etc/fstab
#
# /etc/fstab
# Created by anaconda on Fri Feb 24 02:20:51 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/VolGroup-lv_root / ext4 defaults 1 1
UUID=2020ea71-49cf-488e-bd6c-de72a001082b /boot ext4 defaults 1 2
CentOS release 6.5 (Final)
Kernel \r on an \m
/dev/mapper/VolGroup-lv_swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
结果：
w:/path/to/somefile:将符合条件的所有行保存至指定文件
# sed '/^UUID/w /tmp/uuid.txt' /etc/fstab
#
# /etc/fstab
# Created by anaconda on Fri Feb 24 02:20:51 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/VolGroup-lv_root / ext4 defaults 1 1
UUID=2020ea71-49cf-488e-bd6c-de72a001082b /boot ext4 defaults 1 2
/dev/mapper/VolGroup-lv_swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0