1. Run a program using only idle cycles loadwatch forks a child process and only allows it to run when the system load meets user defined parameters. loadwatch allows you to specify that a program should run only if the load is below a set point, and will stop it when that point is reached. When the load falls below a second setpoint, the program will be continued. The period of sampling the system load can also be specified by the user. From Debian 3.0r0 APT