Install TeamCity Build Agent on Ubunutu 12.04

InstallTeamCityBuildAgentUbuntu.sh

# install dependencies
$ sudo apt-get update
# jre headless (no gui)
$ sudo apt-get -y install openjdk-7-jre-headless

# download TeamCity agent
$ wget http://myteamcityserver/update/buildAgent.zip
$ unzip buildAgent.zip -d buildAgent
$ cp buildAgent/conf/buildAgent.dist.properties buildAgent/conf/buildAgent.properties
$ chmod +x buildAgent/bin/agent.sh

# update serverUrl=http://myteamcityserver and name=mybuildagent
$ vim buildAgent/conf/buildAgent.properties 

# add teamcity user
$ sudo -s
$ useradd -m teamcity
$ usermode -a -G openssh teamcity
$ passwd teamcity

# generate ssh key for git access
$ ssh-keygen -t rsa
# create config file /home/teamcity/.ssh/config

# move buildAgent to /home/teamcity/agent
$ sudo mkdir -p /home/teamcity/agent
$ sudo cp -r buildAgent/* /home/teamcity/agent

# cleanup
$ rm -rf buildAgent.zip buildAgent

# create the start script - see https://gist.github.com/lukehutton/9477210
$ sudo vim /etc/init.d/teamcity-agent

# grant permissions and add it to the startup process
$ sudo chmod 755 /etc/init.d/teamcity-agent
$ sudo update-rc.d teamcity-agent defaults

# reboot and test
$ sudo /sbin/shutdown -r now