You have to first run the Ant before running check-in client. Otherwise it will display you a warning to do so. If you have not installed Ant, see Installing Apache Ant on Linux or Installing Apache Ant on Windows for the instructions on how to do it.
Then run the following command:
checkin-client.sh
- Run this command in linux.checkin-client.bat
- Run this command in windows.
See the following pages to learn how to use the Check-in client.