If you see an error similar to the error shown below while using RedHat this is due to the launch agent executing the build agent being downloaded to a temporary directory which cannot be referenced due to noexec being turned on.
ERRO error running task error="allocation=\"xxxxxxx\" start failed: fork/exec /tmp/circleci-launch-agent2519696502/circleci-agent/1.0.143708-e64ffe64/linux/amd64/circleci-agent: permission denied"
To resolve this change the location of the temporary direction by setting the TMPDIR environment variable.
The directory used for the build agent is changed by adding the following to
/etc/systemd/system/circleci.service (using /opt/circleci/tmp for example):
After making the addition, the file should resemble the following:
ExecStart=/opt/circleci/circleci-launch-agent --config /opt/circleci/launch-agent-config.yaml
WantedBy = multi-user.target
Once this change has been made you should no longer see the issue and you should be able to build using runner.