Teamcity free disk space requirement - Free disk space requirement of 3 GB could not be met for directory /opt/JetBrains/TeamCity - TeamCity Out of Space

By default TeamCity has 3 GB space for build. If you have smaller instance, you can change it to reduce.

Open buildAgent configuration file by executing below command:
sudo vi /opt/JetBrains/TeamCity/buildAgent/conf/buildAgent.properties

add below line
system.teamcity.agent.ensure.free.space = 2gb

save the file

Now restart the build agent
/opt/JetBrains/TeamCity/buildAgent/bin/agent.sh stop

/opt/JetBrains/TeamCity/buildAgent/bin/agent.sh start


Click here to see steps for installing TeamCity on Ubuntu