For advanced Linux users, starting, stopping, and restarting Linux services is essential. These operations allow users to access the functionality of each service. For example, to use a web server, users need to start the Apache service, or to use a database, users must start the MySQL serv...
As of this writing, the kernel does not emit specific messages when it’s about to start its first user process. However, the following memory management messages are a good indication that the user-space handoff is about to happen because this is where the kernel protects its own memory fro...
Another limitation is that you can only start a fixed set of services as defined by the boot sequence: When you plug in new hardware or need a service that isn’t already running, there is no standardized way to coordinate the new components with init. systemd and Upstart attempt to remedy...
Before killing a process, you need to locate it. Processes can be found by the process name (or a partial process name) or theprocess ID (PID). There are multiple ways tofind a process in Linux: Via thepscommand. Via thepgreporpidofcommand. Via thetop command. The sections below show...
To start a service in Linux, type in the following: sudo systemctl start [service-name]Copy For instance, the command to start theApacheservice is: sudo systemctl start apache2Copy The command has no output. Verify the service is active with: ...
START – Time the command started TIME – CPU time the process has consumed COMMAND – Command name and arguments 2. pstree – Command to Manage Processes in Linux The pstree command displays processes in a tree format: # pstree systemd─┬─2*[agetty] ...
Example # 1: Using a Wait Command for Bash Single Process. We use the wait command to specify when a script’s background process must start processing. In the following bash script, we have used the echo command which prints the statement “Background Process” which means that the backgr...
Sometimes things go wrong and we have to kill a running process. In this how-to we show you how easy this can be via the terminal.
The kernel starts a program called init with a process ID of 1. This point is the user space start. init sets the rest of the system processes in motion. At some point, init starts a process allowing you to log in, usually at the end or near the end of the boot.This chapter cover...
First, open upSystem Settingswindow. You will findStartup and Shutdownicon under System Administration. Click on the icon. You will be asked to choose an application to auto-start among a list of known applications. If your program is not listed, enter the name of the program in the top...