Amongst other things, the Linux kernel is responsible for making all running processes interact well with each other. One of the ways in which it does this is by determining which applications should get more CPU time than others. By default, the kernel handles this without interaction from the user, but there may be cases […]
Putting a process or application in the background means that the process essentially detaches itself from the consol, but keeps executing. This frees up the console to do other things.
You can either put a process into the background immediately upon launch, or you can stop a process already running in the foreground and resume it […]
One of the most useful of all Linux’s features is the ability to suspend and resume processes. If you’re running a shell process such as the NANO editor and need to quickly get back to the command line without terminating your work, control-z is your friend.
CRTL-Z will stop the active job and push it to […]
KInd of confusing, but essentially, you can use the kill command to tell processes to terminate themselves in nicer ways than killing them. For example:
kill -15 pid
Will terminate the process assocated with pid, but the process will be asked to terminate gracefully instead of the hari-kari job that a straight kill -9 pid would cause.
I’m […]
There are a number of signals that can be sent to running processes to manage their execution. One of my favourite (based entirely on the name) and arguably more useful commands is the kill command.
kill -9 pid
Quite simply sends signal 9, the kill signal, to the specified pid (process identidication). You can find the pid […]
I’m sure you’ve all noticed by now that my posting frequency on New Linux User here has dropped a bit in the last two weeks. I want you to know that I know and that I know you know. You know?
I’ve had one of those weeks where a bunch of things that I started before […]
Now that we know how to monitor processes with ps, pstree, and top; it may become necessary to stop a rogue process from running. To do so, we send signals to the process.
This post is an overview of the available signals, and subsequent posts will contain more detail about each one. There’s a numeric […]
The top command shows much the same information as the ps command, but in a contiuously updated screen. Rather than just spewing its data onto the screen, top runs until it is terminated by the user….
This is one of the neatest commands in GNU/Linux. The simple command pstree will show you all of the processes running on your machine in a hierarchical format starting with the uber parent process, init.
There are command-line options you can feed pstree, but I’ve never used them because the default output is so useful and […]
The ps command will display the running processes on a GNU/Linux system. As with many command-line applications, there are many options and switches. I’m just going to touch on the few more common but you can use the man ps command to find out other things you can do with ps.
ps by itself will display […]
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