[mayur@mayur311-pc ~]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 3.6G 47G 8% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 148K 3.9G 1% /dev/shm
tmpfs 3.9G 9.1M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda6 494M 159M 336M 33% /boot
/dev/mapper/centos-home 73G 62M 73G 1% /home
tmpfs 782M 32K 782M 1% /run/user/1000
为什么有 4 个tmpfs和/dev/mapper/驱动器？