Trying to log in but can\'t. My tomcat-users.xml, modified as I saw it here.
Check the permissions and ownership on the file '/etc/tomcat7/tomcat-users.xml'. It should owned by root and group ownership should be tomcat7.
-rw-r----- 1 root tomcat7 2101 Jan 22 10:34 tomcat-users.xml
This is on Ubuntu 14.04.3 LTS, YMMV