In this post I am going to show how to update the file config/app-conf.xml in a war called frontend.war by using the jar-command.
To list the contents of our jar archive we type the following:
jar tf frontend.war
To extract the config file from the archive, type
jar xf frontend.war config/app-conf.xml
This creates a folder named config with the file app-conf.xml inside. Now you can edit the config file. After you are done editing the file you can update the archive by typing
jar uf frontend.war config/app-conf.xml
For having a quick look at the contents of a file you can use the unzip command:
unzip -q -c frontend.war config/app-conf.xml(the c switch redirects output to stdout, the q(uiet) switch suppresses all other output. That's all!
