I´am on a windows machine, and I understand that it is a little different here.
The problem is that I can't find any information on how I stop, kill or exit nodemon.
For purposes of completeness, The correct answer is press Ctrl + C. Or you could also find it in task manager and kill it. This applies to pretty much anything on the command line.
My experience here is that Ctrl+C leaves a node instance running in the background. If you want to kill the stack, when you try to restart 'nodemon server.js' or just 'node server.js' for that matter, you will get an EADDRINUSE error because the old node server has the port tied up. You have to find it by using ps -W | grep node in the terminal window, because the task manager wont show it. Also you can kill it with the process ID (PID) with taskkill. The /F is the 'force' parameter. Here we will kill the task with PID 7528.
$ taskkill /F /PID 7528
Then check ps -W | grep node again, and the node server should be gone, and the server will launch again.
Their docs show a few tricks on intercepting the shutdown command, but since they use a 'rs' command to restart, they could add a 'kill' command to shutdown the daemon.
Brian
I used git bash on window and I couldn't terminate the nodemon process with ctr + c, so I would terminate the node process on the task manager to use the same port. Later I found on github to why nodemon doesn't terminate in git bash. Anywaypowershell should be use instead, after ctr + c it will ask either to terminate batch job or not. This action will clear the process and stop nodemon.
Press Ctrl + C to exit from Nodemon on windows. If that does not work, simply end the task from task manager and run it again.
With the keys ctrl + c
With this you can get out of our nodemon
Or with this you can prevent the module from continuing to work
process.exit(1);
Go to --> C:\Users\username\AppData\Roaming\npm\node_modules\nodemon\bin.
In bin folder there is windows-kill.exe file.
I had issues with this until I ran command prompt as an administrator. Then Ctrl + C worked.
EDIT: Sorry, the above worked once and then stopped working. I did end up finding this article: http://www.wisdomofjim.com/blog/how-kill-running-nodejs-processes-in-windows . The command provided here (taskkill /im node.exe /F) works consistently for me on Windows, when I run it in a new command prompt window.
type .exit (it worked in my case)
Related
Let me start of by saying i just started learning linux.
I have a command that keeps processing/loading until i press CTRL+C to cancel/stop the command and remain in session.
What i want is to send that command, wait x amount of seconds and then close it programmatically in a single command (cause i can't enter new commands when its loading). Sorry if it sounds stupid, but that would solve my problem.
Would really appreciate if someone could've helped me out here, couldn't find anything on google that was working (mostly exiting the session while the command remains loading).
Use sleep command for terminate the process.
example:
echo helloword & sleep 1 --> time indicates in seconds.After executing the echo command it will wait for one second and then it terminate the echo process
use nohup. example:
nohup ./foobar.sh & < /dev/null > ./log 2>&1
exit
In foobar.sh you can have the following content
command you wish to execute
sleep <no of seconds>
or you can use "screen", you need to install "screen" in you host, then
> screen {your-cmd}
and press ctrl+A followed ctrl+D detach current (but your cmd still running) session .
I am running a server with Ubuntu 14.04 using nodejs with
npm start
command.
I start tmux session with
tmux
command, then do
npm start
and finally do
ctrl+d
to detach.
But ctrl+d would not work for me. Whatever I am using, it only detaches me from the session if I stop all the processes.
It is also same problem when I am trying to detach from session with mongod running.
Any ideas?
PS: running ctrl+a+d does not work either.
When issuing a tmux command, you need to first use the prefix key combination. By default, this is C-b (ctrl+b).
If the default prefix isn't working, it's possible that you changed it or, if you're using someone else's .tmux.conf, they may have changed it. You can run tmux list-keys | grep send-prefix from your shell to determine what the current prefix is.
So, in order to detach from a running session, you'd type C-b d.
Let me explain better. What is gonna happen if I run a command in Linux and before it's done and you could enter another command I close the terminal. Would it still do the command or not?
Generally, you must expect that closing your terminal will hangup your command. But fear not! Linux has a solution for that too!
To ensure that your command completes, use the nohup argument first. Simply place it before whatever you are trying to do:
nohup ./some_program
nohup ./do_a_thing -frx -file input_file.txt
nohup grep "something" giant_list_of_files/* > temp_file.txt
The nohup command stands for "no hangup" and it will ensure that the command you execute continues to run, even if you close your terminal.
It depends on the process and your environment (job control shell options, VNC, etc). But typically, no. The process will get a "hangup" signal (message) from the operating system, and upon receiving that, will quit.
The nohup command, for example, arranges for processes to ignore the hangup signal from the OS. There are many ways to achieve the same result.
I would say it will abort att the status you are in just before the session close.
If you want to be sure to complete the job, you will need to use the nohup command.
http://en.wikipedia.org/wiki/Nohup
Read about nohups and daemons (-d)...
A good link is [link]What's the difference between nohup and a daemon?
Worth look at screen command, Screen command offers the ability to detach a long running process (or program, or shell-script) from a session and then attach it back at a later time.
how can I continously run a script in background without using crontab. The script should run even after I logout and is acceptable if it doesen't start after system reboot.I am new to unix.
There's a couple of ways of doing this but the neatest way is to use screen. This lets you create a session which lives perminently on the machine and you can simply reconnect to to check on the progress of your long running process.
If you don't wish to use screen you can use nohup this allows you to run a task like:
nohup mytask &
Your task will now run in the background and will survive a log off, however there's no way to take control of it again, unlike with screen.
if [ "x$1" != "x--" ]; then
$0 -- 1> /dev/null 2> /dev/null &
exit 0
fi
This is how you can run a script as a daemon. First your script (the father) will create a copy of himself (a child) so it is considerd as a process of the father. Then the father kills itself while the child is still running. Guess what happens when you do such a thing ? The child is attached to the init process. So even if you logout, the script will still run.
You can even start it without the "&" operator because you start the father which is killed a millisecond after.
You can take control over it again like any program running on your computer.
By the way it's not a real "daemon" program, it's just kind of emulation. You can't just start it at the boot (I mean really the BOOT and not the loggin) if you want to start it as you login, quite simple put it in your .xinitrc
The main advantage of this solution is that your script doesn't depend on any other programm such as "nohup" which is really bad I think.
Regards
PS : If you want some informations about what the command above does, just ask me. It's just a "parameter" thing.
As others have mentioned before, you need to use nohup to prevent the process from getting the hangup signal (hence no-h-up).
However, if you start the process in the background to begin with, as
prompt> nohup process &
that has the disadvantage of not allowing you to enter any data that may be required to get the process started off. This may be passwords/credentials or other input the process needs.
If you have that requirement, start it without the "&" at the end, enter your input and then hit Ctrl-Z to put the process to sleep. To send it to the background, type "bg" at the prompt and hit Enter.
prompt> nohup process
Enter password:
(Now press Ctrl-Z)
[1]+ Stopped process
prompt> bg
[1]+ process &
Now even if you log off, the process will continue to run in the background.
Alternatively if you are using bash or zsh, if you didn't start the process with nohup to begin with, and killing it and restarting is not an option then you can use the built-in disown command. First pause and background the process. And then stop hangup signals from reaching it.
prompt> process
Enter password:
(Now press Ctrl-Z)
[1]+ Stopped process
prompt> bg
[1]+ process &
prompt> disown -h
Note: If you've got other background jobs running, you need to provide the jobspec to only disown this specific job.
prompt> disown -h %1
Instead of [1] if you'd seen [2] when you paused and sent the process to the background, you'd say disown -h %2 instead.
As well as starting it in the background, as above, you may need to use 'nohup'. This means it will carry on running, even if you close the terminal.
nohup ./abc.sh &
start it in background using & operator e.g.
./abc.sh & this will continue till (a) the execution is complete or (b) you kill it or (c) system reboots
I'm not advanced linux user. I use ubuntu.
When I start any process from terminal, for example firefox, I type in:
firefox
The process starts and then I need to write another commands in terminal. For example, I want to change directory, but I can't do it, because firefox is started. And I don't want to close it, but want to enable terminal.
Sorry if my explanation is not clear, I do not know english well.
You can start the process in the backgroun with
firefox &
If you start it with
firefox
it will be in the foreground and you can move it to the background with Ctrl+Z (this will put it in the background but the process will freez until you use bg command) then you must execute
bg 1
where 1 is the job id. You can see the job id with command
jobs
If you need to return the process to the foreground you must use
fg 1
where 1 is the job id.
Simply do this here:
firefox &
drops it to the background.
Also check out the commands disown, nohup and fg.
If your command has already started, you can use Ctrl+Z to send a suspend signal to the running process. Then you can use the bg command (passing in %1 to symbolize the first process on the job list) and that will turn it into a background process, as if you had used the & in the original command.
If you end your command line with &, the program will run in the background and you will be able to use the terminal for other commands. Example: firefox &.
To run any command in background just put & at the end of command