If you have any queries and problem please comment in comment section. I hope this article will hep to list all running process on Linux system. Means the process is either a daemon or process started by the system or process related to a cron job. Question mark in tty field display, the process was not started from a TTY. I have also noticed in some cases, there was a question mark ( ?) instead of the tty name in that column. I have also confirm tty name with help of tty command. Root 13594 0.0 0.1 3912 672 pts/1 R+ 09:46 0:00 grep lsĪbove tty column contains a pts/1 which is the tty name from where the command was executed. TTY : Display the terminal name from where the process was started. RSS (Resident Set Size) is the portion of RAM (Physical Memory) that a process is using. VSZ is used to show the amount of virtual memory used by process.
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