To reset Tomcat manager password, follow simple steps.
1) Got to the apache-tomcat directory and open file following in your favorite editor
cd /usr/local/apache-tomcat-6.0.20/conf/
vi tomcat-users.xml
Part of file contents before update.
<tomcat-users>
<!--
<role rolename="tomcat"/>
<role rolename="role1"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat" roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>
-->
</tomcat-users>
Now , update the file as follows
<tomcat-users>
<!--
<role rolename="tomcat"/>
<role rolename="role1"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat" roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>
-->
<role rolename="manager"/>
<role rolename="admin"/>
<user username="admin" password="YOURPASSWORD" roles="admin,manager"/>
</tomcat-users>
For changes to take effect, restart the Tomcat service and check by logging with the user admin and password that you have set.
