[java] What is the default username and password in Tomcat?

I installed Netbeans and tryed to access the server's manager using: (id/pass)manager/manager, admin/admin, system/password... None of them worked.

Check the file in <TOMCAT_HOME>/conf named tomcat-users.xml.
If you don't find something there edit to look something like:

<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
  <role rolename="admin"/>
  <user username="admin" password="password" roles="standard,manager,admin"/>
</tomcat-users>

First navigate to below location and open it in a text editor

<TOMCAT_HOME>/conf/tomcat-users.xml

For tomcat 7, Add the following xml code somewhere between <tomcat-users>

  <role rolename="manager-gui"/>
  <user username="username" password="password" roles="manager-gui"/>

Now restart the tomcat server.

Platform NetBeans 7.3, Apache Tomcat 7.0.34 re: Tomcat Manager

I spent 3 days tracking this down because I thought I had a bad install.

On Windows and Linux, NetBeans uses a separate file location for CATALINA_BASE:

http://wiki.netbeans.org/FaqInstallationDefaultTomcatPassword

So you can modify the tomcat_user.xml under CATALINA_HOME: until your face turns blue, to no effect.

It appears that the IDE only requires, manager-script,admin roles under CATALINA_BASE:.

When I tried to add a user to the manager-gui role (to the correct tomcat_user.xml file), required for access to the Tomcat Manager, Tomcat stopped presenting the login dialog and went directly to the 401 access denied splash page.

It appears that the NetBeans package uses a locked-down version of TomCat.

I hope this saves everyone some time.

Only this helped me:

To use the web administration gui you have to add the gui role :

<role rolename="admin"/>
<role rolename="admin-gui"/>
<role rolename="manager"/>
<role rolename="manager-gui"/>

<user username="name" password="pwd" roles="admin,admin-gui,manager,manager-gui"/>

If people still have problems after adding/modifying the tomcat-users.xml file and adding the relevant user/role for the version of Tomcat that they're using then please be sure that you've removed the comment tags that are surrounding this block. They will look like this in the XML file:
<!--
-->
They will be above and below the user/role section.

In Tomcat 7, under TOMCAT_HOME/conf/tomcat_users.xml, see the <user /> tag to see password.

Example:

  <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"/>

Go to "%TOMCAT_FOLDER%/conf/tomcat-users.xml" and configure the following :

<tomcat-users>
    <role rolename="manager-gui"/>
    <role rolename="manager-script"/>
    <role rolename="manager-jmx"/>
    <role rolename="manager-status"/>
    <role rolename="admin"/>
    <user username="admin" password="admin" roles="admin,manager-gui,manager-script"/>
</tomcat-users>

Hence, the username is "admin" and password is "admin"

In Tomcat 7, 8, and 9 there is NO default user, so nobody can access a Manager app. You need to alter conf/tomcat-users.xml by adding new user with the role "manager-gui", like:

<role rolename="manager-gui"/>
<user username="admin" password="admin" roles="manager-gui"/>

Look up here: https://www.mkyong.com/tomcat/tomcat-default-administrator-password/

in file /conf/tomcat-users.xml check or add:

......
<role rolename="manager"/>
<user username="ide" password="ide" roles="manager,tomcat,manager-script"/>
</tomcat-users>

In conf/tomcat-users.xml you can see what's your actual user configuration, in my case is usually user="admin" and pass="1234"

Open tomcat-users.xml which should be in C:\Tomcat 7.0\conf

Add following lines in above file :

<tomcat-users>
     <role rolename="manager-gui"/>
     <user username="admin" password="" roles="manager-gui"/>

     <role rolename="admin-gui"/>
     <user username="tomcat" password="s3cret" roles="admin-gui"/>        
 </tomcat-users>

Note :

1. admin-gui -> Username & Password - Do not Change.
2. manager-gui -> you can change user name & password for this only. [Here password is not given]

try tomcat tomcat as the default username and password (tomcat 7)

Well, you need to look at the answers above, but you'll find that the manager app requires you to have a user with the role 'manager', I believe, so you'll probably want to add the following to your tomcat-users.xml file:

<role rolename="manager"/>
<user username="youruser" password="yourpass" roles="manager"/>

This might seem simplistic, but it's just a simple implementation that you can extend / replace with other authentication mechanisms.

In Tomcat 7 you have to add this to tomcat-users.xml (On windows 7 it is located by default installation here: c:\Program Files\Apache Software Foundation\Tomcat 7.0\conf\ )

<?xml version="1.0" encoding="UTF-8"?>
<tomcat-users>
  <role rolename="manager-gui"/>
  <role rolename="manager-script"/>
  <role rolename="manager-jmx"/>
  <role rolename="manager-status"/>
  <role rolename="admin-gui"/>
  <role rolename="admin-script"/>
  <user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>
</tomcat-users>

NOTE that there shouldn't be ANY spaces between roles for admin, as this list should be comma separated.

So, instead of this (as suggested in some answers:

<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status, admin-gui, admin-script"/>

it MUST be like this:

  <user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>

Look in your conf/tomcat-users.xml. If there is nothing there, you'd have to configure it.

If your apache tomcat asking for password,then just follow these steps: go to the home directory of apache then go to webapps folder open the META-INF inside that you will find an xml file named context.xml--open it in edit mode

and REMOVE THE COMMENT FROM the VALVE tag.

After that you dont need any user name and password.

For Window 7, Netbeans 8.0.2 , Apache Tomcat 8.0.15
C:\Users\JONATHAN\AppData\Roaming\NetBeans\8.0.2\apache-tomcat-8.0.15.0_base\conf\tomcat-users.xml
The Tomcat Manager Username and password is like below pic..