![]() If you log out or close the terminal, the process is not terminated. nohup: ignoring input and appending output to 'nohup.out' The command output is redirected to the nohup.out file. To run a command in the background using the nohup command, type: nohup command & SIGHUP is a signal that is sent to a process when its controlling terminal is closed. To list all running processes, including the disowned use the ps auxĪnother way to keep a process running after the shell exit is to use nohup.Ĭommand executes another program specified as its argument and ignores all SIGHUP (hangup) signals. If you have more than one background jobs, include % and the job ID after the command: disown %1Ĭonfirm that the job is removed from the table of active jobs using the jobs -l command. One way is to remove the job from the shell’s job control using the disown shell builtin: disown There are several ways to keep the process running after the interactive shell session ends. If your connection drops or you log out of the shell session, the background processes are terminated. Keep Background Processes Running After a Shell Exits # Move the stopped process to the background by typing bg.To move a running foreground process in the background: To terminate the background process, use the killĬommand followed by the process ID: kill -9 25177 Move a Foreground Process to Background # If you have multiple background jobs, include % and the job ID after the command: fg %1 To bring a background process to the foreground, use the fg command: fg The output includes the job number, process ID, job state, and the command that started the job: + 25177 Running ping & Use the jobs utility to display the status of all stopped and background jobs in the current shell session: jobs -l >/dev/null 2>&1 means redirect stdout to /dev/null and stderr to stdout To run a command in the background, add the ampersand symbol ( &) at the end of the command: We will show you how to start a command in the background and how to keep the process running after the shell session is closed. In this article, we will talk about the background processes is Linux. Another option is to run the command in the background.Ī background process is a process/command that is started from a terminal and runs in the background, without interaction from the user. ![]() ![]() The most obvious and straightforward option is to start a new shell session and run the command in it. What if the command takes a long time to finish, and you want to run other commands in the meantime? You have several options at your disposal. When a process runs in the foreground, it occupies your shell, and you can interact with it using the input devices. This is called running the command in the foreground or foreground process. Import -window root -crop 512x256-0-0 -gravity northeast -quality 90 corner.Typically when you run a command in the terminal, you have to wait until the command finishes before you can enter another one. ![]() To capture the 512x256 area at the upper right corner of the X server screen in the PNG image format in a well-compressed file entitled corner.png, without using the mouse, use: To capture the entire X server screen in the JPEG image format in a file entitled root.jpg, without using the mouse, use: To select an X window or an area of the screen with the mouse and save it in the Encapsulated PostScript format to include in another document, use: To select an X window or an area of the screen with the mouse and save it in the JPG image format to a file entitled window.jpg, use: xfce4-screenshooter -f will capture the whole desktop.Or type xfce4-screenshooter from the command line.Or select Applications -> Accessories -> Screenshot from the menus.Use the shortcut key PrintScreen to capture the whole desktop and Alt+PrintScreen to capture the current window (these also work under Windows).How to take a screenshot using Linux PrintScreen, xfce4-screenshooter ![]()
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