[root@xxxxx ~]# /bin/mount -t nfs -o nosuid,noexec,nodev,noatime,intr,rsize=32768,wsize=32768 xxx.xxx.xxx.xxx:/data2/files/guoer/img /data1/files/xx/img
mount: wrong fs type, bad option, bad superblock on 10.172.221.85:/data2/files/xx/img,
missing codepage or helper program, or other error
(for several filesystems (e.g. nfs, cifs) you might
need a /sbin/mount.<type> helper program)
In some cases useful info is found in syslog - try
dmesg | tail or so
# yum install nfs-utils
# yum install rpcbind
# /sbin/rpcbind
lsof -i:111
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
rpcbind 13457 rpc 6u IPv4 3650365091 0t0 UDP *:sunrpc
rpcbind 13457 rpc 8u IPv4 3650365094 0t0 TCP *:sunrpc (LISTEN)