This is a Canonical Question about Connection Refused
We see a lot of questions to the effect
When I try to connect to a system I get a message
Connection refused
Why is this ?
I am testing nginx and want to output variables to the log files. How can I do that and which log file will it go (access or error).
I'm wondering if there is a way to query a DNS server and bypass caching (with dig). Often I change a zone on the DNS server and I want to check if it resolves correctly from my workstation. But since the server caches resolved requests, I often get the old ones. Restarting or -loading the server is not really something nice.
I'm investigating an issue with DB connections being left open indefinitely, causing problems on the DB server. How do I see currently open connections to a PostgreSQL server, particularly those using a specific database? Ideally I'd like to see what command is executing there as well. Basically, I'm looking for something equivalent to the "Current Activity" view in MSSQL.
(I have already read How can I test a new cron script ?.)
I have a specific problem (cron job doesn't appear to run, or run properly), but the issue is general: I'd like to debug scripts that are cronned. I am aware that I can set up a * * * * * crontab line, but that is not a fully satisfactory solution. I would like to be able to run a cron job from the command line as if cron were running it (same user, same environment variables, etc.). Is there a way to do this? Having to wait 60 seconds to test script changes is not practical.