This can be done using open source software called Synergy. This application allows you to connect the keyboard and mouse to one computer which acts as a server for those devices. The setup is intended to have multiple computers connected to multiple displays but only to have one keyboard and mouse. This is not to be confused with the use of KVM (Keyboard-Video-Mouse) switches which allow someone to have one monitor with multiple PC’s connected to it and via a button or dial you can switch between them. KVM switches have been used to connected only the keyboard and mouse while still having multiple displays. Synergy is more for moving between the devices without having to click a button. The software has not been developed on for a long time however there is support for Windows XP and Unix/Linux. I ended up not going with the Synergy solution because I decided I could just manage the Linux servers at my house from a shell but wanted to write about it in case others had the need to share a wireless keyboard and mouse in this scenario. Read below about installing Synergy.

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I noticed this error during an ISPConfig on CentOS 5.2 install and realized I had installed postfix without MySQL support. After looking around for a bit I was unable to locate a yum repository that included a postfix package with MySQL support built in so I decided to download the source RPM and install by modifying the SPEC file. Below are step by step instructions of what to do.

1. Remove postfix: rpm -e –nodeps postfix
2. Download the src RPM here. Located in the following directory: /centos/5.2/os/SRPMS/
cd /usr/local/src
Example: wget http://mirror.mojohost.com/centos/5.2/os/SRPMS/postfix-2.3.3-2.src.rpm 
3. Install source RPM: rpm -i postfix-2.3.3-2.src.rpm # Install the Source RPM
4. Edit File: cd /usr/src/redhat/SPECS
Edit postfix.spec: %define MYSQL 0  to  %define MYSQL 1
5. Install Packages: yum install pcre-devel mysql-devel 
6. Build The RPM: rpmbuild -ba postfix.spec (You will see lots of warnings, enjoy.)
7. Install new RPM: cd /usr/src/redhat/RPMS; rpm -i postfix-2.3.3-2.i386.rpm

That should do the trick. If you are like me and happened to be in the middle of installing ISPConfig then you will have a bunch of configuration changes to add back in for postfix.

Sometimes after upgrading your RPM packages with YUM there will be new configuration files generated. These files have .rpmnew tacked onto the end and are created this way so they do not overwrite any configuration file changes you have made. You can find all of the .rpmnew files by running the following command from your shell.

find /etc /var -name *.rpmnew

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