Monitor and manage images in Red Hat

Red Hat Enterprise Linux provides many graphical tools that make it easier to manage Red Hat servers, even if you have no experience in command line. Learning how to set PuTTY and Xming and how to start graphical programs on your server is a good start. In this article, you will learn how to use the gnome-system-monitor command to monitor and manage processes on the server.

Everything your server does is in the form of a process. For example, if you start an Apache Web server, it runs different processes. In some cases, these processes cannot do what they should do. When this happens, process monitoring and management become very important.

The graphical tool for monitoring and managing processes is Gnome System Monitor. If you are running a complete graphical desktop, you can find it under the path Applications> System Monitor. If you want to start the tool through a remote connection, such as a PuTTY/Xming connection, you can run the gnome-system-monitor command to start the tool. If you cannot start this program, use the yum-y install gnome-system-monitor command to install it on your server.

Gnome System Monitor provides a convenient way to manage processes

The most important tag on Gnome System Monitor is the Processes tag. Here you will find a list of processes with the most active processes at the top of the list. You can decide how to classify these processes: Click the % CPU title bar to classify processes based on CPU activity, or click the Memory title bar to classify processes based on Memory usage.

Click the title bar to specify how to select a process

If a process causes you trouble, right-click the process to find all related management tasks. If a process gets stuck and you need to terminate it, or if a process consumes all available CPU cycles and you need to reduce the CPU usage, you may want to do so. By right-clicking a process in any list, you will access a common process management task. The following five are the most relevant:

• Stop process: This management task suspends a process. If you want to temporarily free up more available system resources for other tasks to run more stably, use this process management task.
• Continue: When you want to continue running a process after it is stopped, use this process management task.
• Terminate process: This option can be used to terminate a process in a mild way. Related processes will receive a signal to stop their work, and there is enough time to close open files, save files, and terminate the process after completing the above work.
• Delete process: if a process cannot be terminated by using an ending process, you may want to forcibly terminate it. If you want to terminate the selected process under any circumstances, use this program. When using this option, you must note that all files are not saved when they are closed, and you may lose data.
• Change Priority: by default, all processes share the system time equally. In some cases, your process may not get enough system time. If this happens, you can change its priority or its nice value. After this option is selected, a slider is displayed to set a new nice value. Sliding to the Left can increase the priority (a negative nice value will be displayed), or sliding to the Right to lower the priority.

Use a slider to increase or decrease the nice value to adjust the process priority.

The Process Management tag is the most important tag in gnome-system-monitor, but it is not the only tag. You can find more useful information on the resource tag, which displays the performance charts of your system, you can also view the disk space available on the file system tab of your server.

The gnome-system-monitor tool provides you with everything you need to manage processes on a RedHat server. You can use it to get an overview of the Load Caused by processes on your server, terminate processes or adjust their priorities.

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