Allows you to modify the priority of the marked process (or all marked processes). Under Linux a process has a priority (nice value) ranging from -20 (best) to +20 (worst), thus increasing the nice value gives a process less CPU time. You are not allowed to lower the nice value (improve its priority) unless are the super-user. This means that, as an ordinary user, you cannot lower the nice value of a process even if you raised it before.
Of course you are only allowed to alter the priority of your own processes. The super-user is allowed to modify the priority for any process, and he may lower the priority.
This option is only available to root. The Change Scheduling... dialog allows the super-user to change the scheduling policy of the selected processes (using the Posix.1b real-time extensions present in the Linux 2.0.x kernels). Normal processes are set to SCHED_OTHER and have static priority 0; (soft) real-time processes have the policy SCHED_FIFO or SCHED_RR and a static priority in the range of 1 to 99.
Displays a list of TCP and UDP sockets used by the selected processes.