B Binary: process memory to be freed on exit. K Killed: some one has killed this process. Load The load address of the program; actually the call address passed to the schedprep system call when the process was scheduled. Stack The address of the process’s stack area. SP The current value of the process’s stack pointer. PC The value of the process’s program counter when it was last descheduled. I, O, E The handles of the process’s standard input, standard output and standard error streams. The last field is the name of the process. This name may be used when referring to the process, for example, using kill . See kill for getting rid of unwanted processes.
Careful readers may note that Andrewtends tochangetheexactinformationgivenineachreleaseoftheoperating system. If you notice a change and want it explained, just contact me and I’ll add it next release. Kill a background process KILL process-name KILL [-ak nn ] processID You can stop a process by name or by PID number. The ps command will list both name and PID number of all processes. Killing by name is usually easier, however if you have several processes with the same name, using the PID number ensures the correct one is killed. Kill emits a "PID: terminated" message via the appropriate output device. The following options are available:
-a kill all children processes -k unconditionally kill - nn specify which signal to send, in decimal, rather than the default sigterm which is 15. See the Programmer’s Manual for details of signals available, which generally follow U NIX conventions. Wait for a process to end "WAIT command ! action" & The wait command returns when the selected PID number has terminated. It may be used to synchronise an asynchronous process, by letting you (or another pro- gram) know when it has ended. Page 86 User Tutorial Manual 1616/OS Commands