How to quickly test if postgres database is accessible?

I whished there were a tool like ping for databases? I just want to ping the database and see if it is accessible from a remote server from Linux command line (bash).

I read about telnet, but I am not sure how it works.

Any suggestions?

Something like:

pg_isready --host=192.168.79.8 --username=test --port=5432

192.168.79.8:5432 - no response

Another solutions is telnet:

telnet 192.168.79.8 5432

Which returns:

Trying 192.168.79.8...
Connected to 192.168.79.8.
Escape character is '^]'.

If the database is accessible.

StackExchange DevOps Q#14789, answer score: 7