sed -i ‘’ -e '/javaagent.jar/ s/$/ proxyPort=8080/' this command should append string only if the line is uncommented

Question

Im using below to append proxyport=8080 to the end of the line where javaagent.jar string found and below is working fine, but this should ignore if there is a # (commented line) in the text file

sed -i '' -e '/javaagent.jar/ s/$/ proxyPort=8080/'

Example input:

#/opt/ver/inmind/javaagent.jar
/opt/ver/inmind/javaagent.jar

Example output should be:

#/opt/ver/inmind/javaagent.jar
/opt/ver/inmind/javaagent.jar proxyPort=8080

score 1 · Answer 1 · answered Feb 15 '21 at 10:14

1

Assuming you have a FreeBSD sed version (as you have -i '' in your command), you can use

sed -i '' -e '/^#/!s/javaagent\.jar.*/& proxyPort=8080/' file

See the online demo.

The /^#/! part stops processing lines starting with # (add [[:space:]]* after ^ to account for indentation, any leading whitespace), and if there is no # at the start, s/javaagent\.jar.*/& proxyPort=8080/ finds javaagent.jar + the rest of the line and replaces this match with itself (with &) and adds a space and proxyPort=8080.

answered Feb 15 '21 at 10:14

Wiktor Stribiżew

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Thank you very much, can I substitute variable instead of string proxyPort=8080 – CSR Feb 15 '21 at 12:24
@ChandraShekharReddy see https://stackoverflow.com/questions/7680504/sed-substitution-with-bash-variables – Sundeep Feb 15 '21 at 13:06
@ChandraShekharReddy See [an example here](https://ideone.com/5Tch1m). – Wiktor Stribiżew Feb 15 '21 at 13:09

sed -i ‘’ -e '/javaagent.jar/ s/$/ proxyPort=8080/' this command should append string only if the line is uncommented

1 Answers1