What do you have in your tnsnames.ora file for the database you are trying to connect to? <a href="http://www.orafaq.com/wiki/Tnsnames.ora">http://www.orafaq.com/wiki/Tnsnames.ora</a> <a href="http://docs.oracle.com/cd/B28359_01/network.111/b28317/tnsnames.htm">http://docs.oracle.com/cd/B28359_01/network.111/b28317/tnsnames.htm</a> Steve <div class="gmail_quote">On 25 January 2013 02:08, Yu Watanabe <<a href="mailto:yu.watanabe@jp.fujitsu.com" target="_blank">yu.watanabe@jp.fujitsu.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi all. I have some trouble executing check_oracle_health. It would be helpful if someone can help me out. I have successfully compiled both ORACLE DBD and check_oracle_health on a nagios server. And as a test , I am trying to execute tnsping to the remote oracle server. Whenever I execute the plugin , I get the follwoing error. check_oracle_health --connect=xe --user=system --password=root --mode=connection-time CRITICAL - cannot connect to xe. ORA-12154: TNS:could not resolve the connect identifier specified (DBD ERROR: OCIServerAttach) The error it self is obvious that its because remote ip address is not defined. Does anyone know where can you defien the info about address or hostname? Thanks, Yu ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, <a href="http://ASP.NET" target="_blank">ASP.NET</a>, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: <a href="http://p.sf.net/sfu/learnnow-d2d" target="_blank">http://p.sf.net/sfu/learnnow-d2d</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div>