正确的 BASH 管道语法

Question

I'd like to do a one line bash command to ping a server, then send an email if it fails.

I was thinking it ought to look something like:

ping whatever.com || echo 'Subject: VPN Failed" | sendmail me@me.com

But my BASH skills are "growing" and I'm apparently missing something. What would be the proper way of doing that?

Answer 1

You mixed single/double quotes.

In addition, if you want to use instruction in case of failure, I recommend using the ! and && operators, which will allow you to perform several instructions.

For instance:

! ping whatever.com && echo "An error occured, system will send an e-mail" >&2 && echo "Subject: VPN Failed" |sendmail me@me.com