To check the instance status type “onstat -“ from command prompt as shown in below screenshot
ids9> onstat –
“On-Line” from above screenshot means the instance is up and running.
9.40.HC7: is the Informix version number
and the instance is on line from 212 days 19:25:41
Note: onstat is an utility that comes with Informix installation. The path of this utility is: $INFORMIXDIR/bin/onstat