Upgrade

Prepare

Make sure you have backed up your Nexus repository (don’t forget your release artifacts).
Stop the Nexus service.
Un-install the service, run UninstallNexus.bat which is in this folder:
```
nexus-webapp-1.0.2\bin\jsw\windows-x86-32\
```

Upgrade

Download the latest bundle, nexus-webapp-1.2.0.4-bundle.zip
Un-zip the bundle archive into the Nexus folder. Your Nexus folder structure will look a bit like this:
```
nexus-webapp-1.0.2
nexus-webapp-1.2.0.4
sonatype-work
```
Install the updated service: run InstallNexus.bat which is in this folder:
```
nexus-webapp-1.2.0.4\bin\jsw\windows-x86-32\
```
Start the service…
Check the log file:
```
sonatype-work\nexus\logs\nexus.log
```
Browse to http://localhost:8081/nexus/

Configuration

Log into the application as an administrator. The default user name and password are admin, admin123.
Change the administrator password, by selecting, Change Password in the left hand Security menu.
Change the administrator account by selecting Users in the left hand Security menu.
Update the email configuration by reviewing the Server configuration in in the left hand Administration menu.
Review the storage locations by checking Repositories in the left hand Administration menu.

Apache

Make sure the Base URL is empty in the Application Server Settings in the Server configuration option (accessed from the left hand Administration menu).

Edit the Apache conf/httpd.conf file, and uncomment the following lines:

LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_http_module modules/mod_proxy_http.so

Add the following to the Apache conf/httpd.conf file (I put it near the end):

ProxyRequests Off

<Proxy *>
  Order deny,allow
  Allow from all
</Proxy>

ProxyPass /nexus http://localhost:8081/nexus
ProxyPreserveHost On

Note: For more information see jetty, Configuring mod_proxy

Re-start Apache, and browse to your Nexus repository: http://svn.mycompany.com/nexus/