我们查看check_dns这个插件的用法则可以使用#./check_dns –h
./check_dns --help
check_dns v1992 (nagios-plugins 1.4.13)
Copyright (c) 1999 Ethan Galstad
Copyright (c) 2000-2008 Nagios Plugin Development Team
This plugin uses the nslookup program to obtain the IP address for the given host/domain query.
An optional DNS server to use may be specified.
If no DNS server is specified, the default server(s) specified in /etc/resolv.conf will be used.
Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
-H, --hostname=HOST
The name or address you want to query
-s, --server=HOST
Optional DNS server you want to use for the lookup
-a, --expected-address=IP-ADDRESS|HOST
Optional IP-ADDRESS you expect the DNS server to return. HOST must end with
a dot (.). This option can be repeated multiple times (Returns OK if any
value match). If multiple addresses are returned at once, you have to match
the whole string of addresses separated with commas (sorted alphabetically).
-A, --expect-authority
Optionally expect the DNS server to be authoritative for the lookup
-w, --warning=seconds
Return warning if elapsed time exceeds value. Default off
-c, --critical=seconds
Return critical if elapsed time exceeds value. Default off
-t, --timeout=INTEGER
Seconds before connection times out (default: 10)
Send email to nagios-users@lists.sourceforge.net if you have questions
regarding use of this software. To submit patches or suggest improvements,
send email to nagiosplug-devel@lists.sourceforge.net