[root@localhost ~]# mount -a
Error: cannot mount filesystem: Protocol error
[root@localhost ~]# cat /etc/fstab    
LABEL=/                                 /                                             ext3        defaults                1 1
LABEL=/home                         /home                                     ext3        defaults                1 2
LABEL=/boot                         /boot                                     ext3        defaults                1 2
tmpfs                                     /dev/shm                                tmpfs     defaults                0 0
devpts                                    /dev/pts                                devpts    gid=5,mode=620    0 0
sysfs                                     /sys                                        sysfs     defaults                0 0
proc                                        /proc                                     proc        defaults                0 0
LABEL=SWAP-sda3                 swap                                        swap        defaults                0 0
# Beginning of the block added by the VMware software
.host:/                                 /mnt/hgfs                             vmhgfs    defaults,ttl=5         0 0
# End of the block added by the VMware software
[root@localhost ~]#    

 是安装了vmware tools的缘故吗？注释
#.host:/                                 /mnt/hgfs                             vmhgfs    defaults,ttl=5         0 0
解决问题