ps displays status information about processes, and optionally, the threads running under each process. By default, for each process associated with the user’s terminal, ps displays the process ID (PID), TTY, processor time used (TIME), and name of the command (COMM).
What is ps output in Linux?
Linux provides us a utility called ps for viewing information related with the processes on a system which stands as abbreviation for “Process Status”. ps command is used to list the currently running processes and their PIDs along with some other information depends on different options.
What is ps output format?
format is a single argument in the form of a blank-separated or comma-separated list, which offers a way to specify individual output columns. The recognized keywords are described in the STANDARD FORMAT SPECIFIERS section below. Headers may be renamed (ps -o pid,ruser=RealUser -o comm=Command) as desired.
What is ps time output?
One of the output fields of the ps commands is the TIME component. As per the man page of ps command, the TIME is: “CPU utilization of process or thread, incremented each time the system clock ticks and the process or thread is found to be running“.
What is ps EF command?
This command is used to find the PID (Process ID, Unique number of the process) of the process. Each process will have the unique number which is called as PID of the process.
What is ps command size?
SIZE includes pages in the private segment and the shared-library data segment of the process. RSS. Real-memory (resident set) size in kilobytes of the process. This number is equal to the sum of the number of working segment and code segment pages in memory times 4.
What is a process state code?
Here are the different values that the s, stat and state output specifiers (header “STAT” or “S”) will display to describe the state of a process. Defunct (“zombie”) process, terminated but not reaped by its parent. …
What does df command do in Linux?
df (abbreviation for disk free) is a standard Unix command used to display the amount of available disk space for file systems on which the invoking user has appropriate read access. df is typically implemented using the statfs or statvfs system calls.
What is TTY in ps output?
A TTY is a computer terminal. In the context of ps , it is the terminal that executed a particular command. The abbreviation stands for “TeleTYpewriter”, which were devices that allowed users to connect to early computers.
What is grep in Linux command?
You use the grep command within a Linux or Unix-based system to perform text searches for a defined criteria of words or strings. grep stands for Globally search for a Regular Expression and Print it out.