mount什么意思

root@Home-Cloud:/mnt# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root             14983192   3712388  10509684  26% /
devtmpfs                978100         0    978100   0% /dev
tmpfs                   978412       460    977952   0% /run
tmpfs                   978412       116    978296   0% /var/volatile
/dev/sda1               102182     13704     88478  13% /mnt

root@Home-Cloud:/mnt# mount
/dev/sda2 on / type ext3 (rw,relatime,errors=continue,user_xattr,acl,barrier=1,data=writeback)
devtmpfs on /dev type devtmpfs (rw,relatime,size=978100k,nr_inodes=227333,mode=755)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /var/volatile type tmpfs (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
/dev/sda1 on /mnt type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)

root@Home-Cloud:/mnt# ls /dev/root
ls: /dev/root: No such file or directory