sed command to retrieve port number

Question

Can you please help me with a sed command to retrieve '9034' value from these JVM arguments.

-OtherJVM1=value1 -OtherJVM2=value2 -Dserver.port=9034 -Dajp.port=8534

Here is what I have tried:

sed -n -e 's/^.*\(Dserver.port=\)//p'

The above sed command is giving:

9034 -Dajp.port=8534

But I only want '9034', within 1 command.

Possible duplicate of [bash get string after character](http://stackoverflow.com/questions/15148796/bash-get-string-after-character) — tripleee, Jul 05 '16 at 14:02
@DevOpsNewB, With `grep` : `grep -oP '(?<=-Dserver.port=)[0-9]*' <<< 'input-string'` — sat, Jul 05 '16 at 14:07

score 1 · Answer 1 · answered Jul 05 '16 at 14:00

1

Try this simple sed command

sed 's/.*Dserver.port=\([^ ]\+\).*/\1/'  <<< "-OtherJVM1=value1 -OtherJVM2=value2 -Dserver.port=9034 -Dajp.port=8534"

answered Jul 05 '16 at 14:00

Kalanidhi

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The above sed does not work. its giving back the entire string – DevOpsNewB Jul 05 '16 at 14:09
which `sed` version your are using ? – Kalanidhi Jul 05 '16 at 14:16

score 0 · Answer 2 · answered Jul 05 '16 at 14:00

0

I don't use SED, but if instead of a "." (dot) in your regex you use a \d, it should match any number of digits after Dserver.port=, without capturing the rest of the string.

answered Jul 05 '16 at 14:00

Asunez

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sed command to retrieve port number

2 Answers2