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On such systems, ps commonly runs with the non-standard options aux, where "a" lists all processes on a terminal, including those of other users, "x" lists all processes without controlling terminals and "u" adds a column for the controlling user for each process. For maximum compatibility, there is no "-" in front of the "aux". "ps auxww ...
It has since been available in illumos and reimplemented for the Linux and BSDs (DragonFly BSD, FreeBSD, NetBSD, and OpenBSD). It searches for all the named processes that can be specified as extended regular expression patterns, and—by default—returns their process ID. Alternatives include pidof (finds process ID given a program name) and ps.
Process management Optional (UP) Run jobs in the foreground file: Filesystem Mandatory Determine file type Version 4 AT&T UNIX find: Filesystem Mandatory Find files Version 1 AT&T UNIX fold: Text processing Mandatory Filter for folding lines 1BSD fuser: Process management Optional (XSI) List process IDs of all processes that have one or more ...
pidof — Print the PIDs of all processes with the given names. ping — Check network connectivity by sending packets to a host and reporting its response. pivot root — Swap OLD and NEW filesystems (as if by simultaneous mount—move), and move all processes with chdir or chroot under OLD into NEW (including kernel threads) so OLD may be ...
A set of processes, comprising a shell pipeline, and any processes descended from it, that are all in the same process group. A job can be referred to by a handle [ b ] called the job control job ID or simply job ID , which is used by shell builtins to refer to the job.
A CPU-bound process, in contrast, generates I/O requests infrequently, using more of its time doing computations. It is important that a long-term scheduler selects a good process mix of I/O-bound and CPU-bound processes. If all processes are I/O-bound, the ready queue will almost always be empty, and the short-term scheduler will have little ...
Copies process regions to swap space in order to reclaim physical pages of memory for the kernel. Also called sched. syslogd: System logger process that collects various system messages. syncd Periodically keeps the file systems synchronized with system memory. systemd: Replacement of init, the Unix program which spawns all other processes. xfsd
Location of the "O(1) scheduler" (a process scheduler) in a simplified structure of the Linux kernel. An O(1) scheduler (pronounced "O of 1 scheduler", "Big O of 1 scheduler", or "constant time scheduler") is a kernel scheduling design that can schedule processes within a constant amount of time, regardless of how many processes are running on the operating system.