If you need to manipulate a Java archive such as a jar or war, and do not have access to the jar utility (it only comes packaged with the JDK, not JRE), you can always use the standard GNU zip/unzip utilities.
Install
The zip and unzip utilities will both be installed with the ‘zip’ package.
sudo apt-get install zip
File listing
Here is how you get a listing of files inside a fictional archive named “my.war”:
unzip -l my.war
Update a single file
If you need to pull out a single file, modify it, then put it back in the archive:
unzip my.war WEB-INF/classes/log4j.properties -d . vi WEB-INF/classes/log4j.properties zip my.war WEB-INF/classes/log4j.properties
You can validate the content was changed using the command below, which just outputs the content from the archive to stdout.
unzip -p my.war WEB-INF/classes/log4j.properties
Delete single file
zip -d my.war WEB-INF/classes/log4j.properties
Delete entire directory
You wouldn’t want to delete the META-INF directory for a Java archive, but just as an example, this would be the command:
zip -d my.war META-INF/\*
REFERENCES
https://linux.die.net/man/1/zip