linux根目录扩容

fdisk -l
104 df -h
105 lsblk
106 fdisk /dev/sdb
107 partprotbe
108 partprobe
109 vi /etc/fstab 
110 mount -a
111 df -h
112 mount /dev/sr0 /mnt
113 vi etc/fs
114 vi /etc/fstab 
115 mount -a
116 lsblk
117 pvdisplay
118 pvcreate /dev/sdb1 
119 pvdisplay
120 vgextend rhel /dev/sdb1
121 vgdisplay
122 lvdisplay
123 lvresize -L +7.99G /dev/mapper/root
124 lvresize -L +7.99G /root
125 lvresize -L +7.99G root
126 fdisk -l
127 lvresize -L +7.99G /dev/mapper/rhel-root
128 df -h
129 resize2fs /dev/mapper/rhel-root
130 xfs_growfs/dev/mapper/rhel-root
131 xfs_growfs /dev/mapper/rhel-root

参考：

https://www.cnblogs.com/lxyuuuuu/p/9717231.html