1. #此处1表示原文件的最后一行;-i.bak会将源文件变成fstab.bak
[root@k8s-master ~]# more /etc/fstab # # /etc/fstab # Created by anaconda on Tue Apr 6 16:56:57 2021 # # 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/centos-root / xfs defaults 0 0 UUID=dc059168-52c0-4287-b877-1385b235bebc /boot xfs defaults 0 0 /dev/mapper/centos-home /home xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 [root@k8s-master ~]# [root@k8s-master ~]# sed -i.bak '/swap/ s/^(.*)$/#1/g' /etc/fstab [root@k8s-master ~]# more /etc/fstab # # /etc/fstab # Created by anaconda on Tue Apr 6 16:56:57 2021 # # 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/centos-root / xfs defaults 0 0 UUID=dc059168-52c0-4287-b877-1385b235bebc /boot xfs defaults 0 0 /dev/mapper/centos-home /home xfs defaults 0 0 #/dev/mapper/centos-swap swap swap defaults 0 0 [root@k8s-master ~]#