Tomcat 7 Manager can't login

Question

Trying to log in but can\'t. My tomcat-users.xml, modified as I saw it here.

Answer 1

Ubuntu Server 14.04.3 tomcat7 installed from repo

What worked for me was removing the role definitions from the tomcat-users.xml file. and then restarting tomcat.

my file now looks like this:

<tomcat-users>
<!--
  NOTE:  By default, no user is included in the "manager-gui" role required
  to operate the "/manager/html" web application.  If you wish to use this app,
  you must define such a user - the username and password are arbitrary.
    -->
<!--
  NOTE:  The sample user and role entries below are wrapped in a comment
  and thus are ignored when reading this file. Do not forget to remove
  <!.. ..> that surrounds them.
-->
  <user username="admin" password="n0tmyr3alp455w0rd" roles="manager-gui,admin-gui"/>
</tomcat-users>

Notice the instructions tell you to define the user who belongs to manager-gui but it does not tell you to define the role "manager-gui"

Answer 2

Try

sudo apt-get install tomcat7-admin