procĪ tremendous amount of information is available on running processes in the /proc directory. Use shift+m to sort by memory use and shift+p to go back to sorting by CPU usage (the default). Tasks: 211 total, 1 running, 210 sleeping, 0 stopped, 0 zombie The top and ntop commands will help when you want to get an idea which processes are using the most resources and allow you to reorder your view depending on what criteria you want to use to rank the processes (e.g., highest CPU or memory use). Just be prepared to be looking at quite a bit more data. You can supply a comma-separated list of usernames instead of a single name. Note that the only process with an assigned TTY is Nemo's shell and that the parent of all of the other processes is systemd. Nemo has only just logged in and is not yet running any commands or scripts. In fact, nearly all these processes shown have been kicked off by system simply to support this user’s online session. This is because details of processes that are being run on the user's behalf are also included.
You can list processes for some particular user with a command like "ps -ef | grep USERNAME", but with ps -fU command, you’re going to see considerably more data.
RSS: the resident set size which shows how much memory is allocated to those parts of the process in RAM.SZ: the process size in physical pages for the core image of the process.
The additional fields shown when you use F instead of f include: Root 1 0 0 42108 12524 0 May10 ? 00:00:06 /sbin/init splashīoth commands show who is running the process, the process and parent process IDs, process start time, accumulated run time and the task being run. UID PID PPID C SZ RSS PSR STIME TTY TIME CMD Using ps -ef will display details on all of the processes running on the system but ps -eF will add some additional details. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
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