The first thing you notice about Linux is the fact that it is, at its core, a Unix-like operating system.
While many Unix-derived operating systems are powerful, they often lack the graphical user interface of the Windows-based versions, so users have to learn the operating system’s fundamental interface in order to understand its capabilities.
Linux is not a Unix; it is the successor of Unix.
If you don’t already know, Linux is based on the Unix operating system, which itself is based off of the UNIX operating system kernel.
But what Linux does not have is a graphical user experience.
The basic user interface is the command line.
The command line is an interface to the operating environment.
Linux commands are run on top of the command prompt, a terminal window that contains the user interface to an operating system like Windows or Mac OS X. In the Linux command line, there are three basic commands: kill , killall , and killallplus .
When a command is run on a terminal, a text editor will open, and the user will see the command in a new line at the bottom of the screen.
If a user enters the command “kill”, they will see a list of all processes that have been killed and their names.
The kill command is used by Linux to kill processes that are running and which are causing a process to hang, but the process name is not actually the name of the process itself.
Linux processes are named by their PID, which is an identifier that is assigned to a specific process.
The process name can be a name that is unique, a string that refers to a group of processes, or an arbitrary identifier that the system assigns.
For example, the process id 0x1000 would be a process named killall.
When you type the command killall, the text editor opens, and you can type the following to kill the process named “kallix” which is running in the background.
killall killall kallix 0 0 killall: process 0x1001 was killed by process 0xff:0.
Killall also allows you to specify the user name that the process should run under.
For instance, to kill “kavala”, the user that you specify with the killall command would be “kalvin” in the killlist above.
If the user specified is not the same as the process specified in the command, then the process will be killed without a user name being specified.
The syntax for killing processes is: kill -u user The kill -s kill command allows you kill a process using the /bin/kill shell command.
The -u argument tells kill to kill process 0, not 0x1010, but you will get the process’s PID number.
To stop a process, you can use the kill -v kill command.
kill -va kill kill All processes have a kill -U argument that causes the process to stop, killing it.
This can be used to kill a particular process or any process that is a member of a group.
To kill a group, you use the -g kill command and the -s argument to kill all processes belonging to a particular group.
The group argument tells killing all processes belongs to a certain group, which in this case is the user you specify in the -u command.
For a complete list of kill commands, see Kill Commands.
The first command you will see when you start a Linux system is the kill command, which kills the process that you specified with the command.
Once you have a process killed, you may use the exit command to exit from the process.
When the process exits, it will hang for a while and eventually stop execution.
There are a few other commands that are available that you may not know about: exit , and exitall .
These two commands allow you to terminate a process without executing a specific command.
They also allow you exit a process from a shell.
A command that terminates a process does not kill it.
When a process is killed, it is not killed by a command, but by an exit signal.
If there is a fatal error, the exit signal will be given.
If, for some reason, the terminal does not respond to a kill command immediately, the system will continue to kill and process until the terminal returns the appropriate signal.
When there is no signal, Linux will continue its execution.
This is a very important distinction because the exit and exit all commands are not always appropriate to use for termination.
For some commands, such as killall and kill , the signal is not returned and the process is not terminated, and Linux continues executing until the signal or the exit process returns.
The Linux system may terminate processes at any time without having to kill them, but it is always advisable to call killall before killing a process.
If Linux terminates processes, it also terminates any other processes that may be connected to the process, but that process is still in the process pool