<html><head><style type="text/css"></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"> Here's the scenario: user John can connect via ssh to SONICSERVER using oracle user without authentication. To verify, i run this command and encountered no problem: ssh -i /home/John/.ssh/id_rsa oracle@SONICSERVER w and the commands run properly. But when i tried this command: [John@SONICSERVER ~]$ /usr/local/nagios/libexec/check_by_ssh -H SONICSERVER -i /home/John/.ssh/id_rsa \ -C "/usr/local/nagios/libexec/check_disk -w 10% -c 5% -e -m" -l oracle It says: CRITICAL - Plugin timed out while executing system call By the way, I also tried : /usr/local/nagios/libexec/check_by_ssh -H SONICSERVER -i /home/oracle/.ssh/authorized_keys -C '/usr/local/nagios/libexec/check_swap -w 50% -c 10%' -l oracle but encounter the same error: CRITICAL - Plugin timed out while executing system call Is there something wrong in the command??? Plugins was own by nagios but i set permission that John can execute it as well. I just notice that most people that uses nagios monitoring via ssh uses dsa not rsa. Is there a diffrence between dsa and rsa when using it to nagios?? </div></body></html>