Linux command: How to check the number of telnet processes

Linux commands are one of the indispensable tools in the daily work of system administrators. They can help us complete various system management tasks. In operation and maintenance work, sometimes it is necessary to check the number of a certain process in the system in order to detect problems and make adjustments in time. This article will introduce how to use Linux commands to check the number of telnet processes, let us learn together.

In Linux systems, we can use the ps command combined with the grep command to view the number of telnet processes. First, we need to open the terminal and enter the following command:

ps -ef | grep telnet | grep -v grep | wc -l

The following is an explanation of the above command:

• ps -ef: List all the commands in the system Process information;
• grep telnet: Filter out process information containing the "telnet" keyword;
• grep -v grep: Exclude it The process information generated by the grep command itself avoids errors in counting;
• wc -l: Counts the number of processes that meet the conditions.

By executing the above command, you can check the number of telnet processes in the current system.

In addition, we can also use the pgrep command to find the PID (process ID) of a specific process, and then count the number. The sample code is as follows:

pgrep -c telnet

In the above command, the -c option indicates that only the number of processes that meet the conditions is displayed.

In addition to the methods introduced above, you can also combine other Linux commands, such as ps aux, awk, etc., to realize the function of checking the number of telnet processes.

In short, being proficient in Linux commands is very important for system administrators. Through the method introduced in this article, I hope it can help you check the number of telnet processes more conveniently and improve system management efficiency. If you want to learn more about the usage of Linux commands, you can consult relevant documents or attend relevant training courses. I hope everyone can complete various tasks smoothly and efficiently at work!

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