cp /etc/fstab /etc/fstab.bak
echo /dev/vdb1 /mnt/disk1 ext4 defaults 0 0 >> /etc/fstab
mkdir -p /mnt/disk1
mount /dev/vdb1 /mnt/disk1
echo "hello world" >> /mnt/disk1/readme
cat /mnt/disk1/readme
hello world
[root@tbari-sh1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 50G 1.4G 46G 3% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 332K 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
tmpfs 3.2G 0 3.2G 0% /run/user/0
/dev/vdb1 99G 61M 94G 1% /mnt/disk1