If Java is not installed, use apt-get or yum to install Java.

[john.doe@server1 ~]# yum install java-devel

The jar command can be used to create a war (web archive) file. Let's take an example where the /var/www/html directory contains some HTML, CSS, and JS files. The following command will create a war file named MyWebArchive.war that contains all of the files at and below /var/www/html. It is important to run this command in the directory that contains the files.

[john.doe@server1 ~]# cd /var/www/html
[john.doe@server1 ~]# jar -cvf MyWebArchive.war *
added manifest
adding: index.html(in = 0) (out = 0) (stored 0%)
adding: about.html(in = 0) (out = 0) (stored 0%)
. . .

VIEW CONTENTS

The jar command with the t (table) and f (file) options can be used to display the contents of the compressed war archive. Notice that the compressed war archive includes a directory named META-INF, and a file named MANIFEST.MF.  This file and directory are included when the compressed war archive is created.

[john.doe@server1 ~]# jar -tf MyWebArchive.war
META-INF
META-INF/MANIFEST.MF
index.html
about.html
. . .