Hi, I am using check_oracle plug in to monitor some of the oracle database parameters. But this is reporting the following error. [nagios@lnxtestsrv1 libexec]$ ./check_nrpe -H <a href="http://10.192.2.239">10.192.2.239</a> -p 5666 -c check_tns No TNS Listener on playdb1 Let me explain, lnxtestsrv1 is a box where nagios server is running and this is monitoring checks(check_http, check_ftp, check_disk, check_swap etc) of other machines just fine. I now need to monitor oracle db on <a href="http://10.192.2.239">10.192.2.239</a> machine where oracle server is running and sid is playdb1. i installed oracle client on this lnxtestsrv1 machine and user nagios has access to sqlplus and tnsping commands I also add nagios to the oracle group (dba, oinstall). tnsping from nagios user works fine. telnet to 239 on port 1521 works ok when I execute this command on the machine where nagios server is running, [nagios@lnxtestsrv1 libexec]$ ./check_nrpe -H <a href="http://10.192.2.239">10.192.2.239</a> -p 5666 -c check_tns No TNS Listener on playdb1 and [nagios@lnxtestsrv1 libexec]$ ./check_nrpe -H <a href="http://10.192.2.239">10.192.2.239</a> -p 5666 -c check_login CRITICAL - in my 239 machine nrpe.cfg has following, command[check_tns]=/usr/local/nagios/libexec/check_oracle --tns oradb-lnx command[check_login]=/usr/local/nagios/libexec/check_oracle --login playdb1 but all commands works if I execute following from 239 machine (oradb-lnx) [nagios@oradb-lnx libexec]$ ./check_oracle --tns playdb1 OK - reply time 10 msec from playdb1 [nagios@oradb-lnx libexec]$ ./check_oracle --login playdb1 OK - dummy login connected I did set the ORACLE_HOME path to where oracle client installed on lnxtestsrv1 machine. Please help me how to fix this. Thanks -Shankar -- Shankar Asam