LinuxQuestions.org - [SOLVED] Grep. Driving myself Insane.

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Grep. Driving myself Insane.

I am running a command that looks like this:

Code:

./ssl-cert-check.sh -s oc.mydomain.com -p 443

It produces this output:

Code:

Host                                            Status      Expires      Days

----------------------------------------------- ------------ ------------ ----

oc.mydomain.com:443                        Valid        Feb 16 2017  90

I want to extract the "Days" from the output, 90 in this instance.

I have been unsuccessful using the following bash command

Code:

./ssl-cert-check.sh -s oc.visionsxtreme.com -p 443|grep '/([0-9])+$/m'

This regex appears to work in the web regex testers, but I cannot produce the desired results in the shell. What am I doing wrong, besides driving myself crazy?!

Thank you. Ben

Over thinking it way too much - try "grep -oE '[0-9]+$' ".

Thank you, but running the following command still does not produce any output.

Code:

./ssl-cert-check.sh -s oc.mydomain.com -p 443|grep -oE '([0-9])+$'

The reason for things like that is generally whitespace at end of line - add it to your regex.

Thank you, I should have realized some white space may have existed. The following worked:

Code:

./ssl-cert-check.sh -s oc.mydomain.com -p 443|grep -oE '([0-9])+ *$'

I appreciate the help!

A little longer, but this type of thing is well suited to awk:

Code:

./ssl-cert-check.sh -s oc.mydomain.com -p 443 | awk '/[0-9]/{print $NF}'