CHECK_NRPE: Error - Could not complete S?报错

在nagios服务器端执行以下命令报错：

[root@nagios libexec]# ./check_nrpe -H localhost

NRPE v2.12

其中192.168.1.18是本地ip，192.168.1.52是被监控端ip，被监控端执行命令结果如下：

# ./check_nrpe -H 192.168.1.52
NRPE v2.12

客户端nrpe.cfg配置为：

# ALLOWED HOST ADDRESSES
# This is an optional comma-delimited list of IP address or hostnames
# that are allowed to talk to the NRPE daemon.
#
# Note: The daemon only does rudimentary checking of the client's IP
# address.  I would highly recommend adding entries in your /etc/hosts.allow
# file to allow only the specified host to connect to the port
# you are running this daemon on.
#
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd


allowed_hosts=192.168.1.18,127.0.0.1

# SERVER ADDRESS
# Address that nrpe should bind to in case there are more than one interface
# and you do not want nrpe to bind on all interfaces.
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd


#server_address=192.168.1.52