t/s expired cert error

[Joseph Tam]

On Wed, 3 Mar 2021, Yassine Chaouche wrote:

>
> Le 3/2/21 ? 9:02 PM, Matthias Kneer a ?crit :
>>> # echo | openssl s_client -connect emu.sbt.net.au:110 2>/dev/null |
>>> openssl x509 -noout
>>>  -enddate
>
> I am intrigued about the function of echo in that command line ?

It just a dummy input so that openssl s_client does wait for data from
stdin.  The OP could have also done

 	openssl s_client ... </dev/null

Joseph Tam <jtam.home at gmail.com>