How to check how many processes are supported in Linux

In Linux, you can use the cat command to check how many processes are supported. This command can connect files and print to the output device. The syntax is "cat /proc/sys/kernel/pid_max"; this command can display The maximum number of processes supported by the system. Due to limitations of system resources such as memory, the result is a theoretical value.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

How to check how many processes Linux supports

In the Linux system, there is a maximum number of total processes.

You can view it through the following command:

cat /proc/sys/kernel/pid_max

The system uses pid_t to represent the process number, then the maximum number of processes Of course, it cannot exceed the type of pid_t. Use the cat /proc/sys/kernel/pid_max command to check the maximum number of processes supported by the system. It will generally be very large, equivalent to the theoretical value. At the same time, due to limitations of system resources such as memory, it will not be possible at all. There are so many processes existing at the same time.

Extended knowledge:

ulimit -n can check the maximum number of file descriptors a process can open. This command can check the upper limit of processes in the system. .

This is a soft limit and can be changed. That is to say, there can be up to 1024 processes on my machine, but you can modify the soft limit on the number of processes by changing the value of this parameter. For example, use the following command to change the soft limit to 4096---- ulimit - u4096.

The cat (full English spelling: concatenate) command is used to concatenate files and print to the standard output device.

Syntax format

cat [-AbeEnstTuv] [--help] [--version] fileName

Parameter description:

• -n or --number: Number all output lines starting from 1.

• -b or --number-nonblank: Similar to -n, except that blank lines are not numbered.

• -s or --squeeze-blank: When encountering more than two consecutive blank lines, replace them with one blank line.

• -v or --show-nonprinting: Use the ^ and M- symbols except LFD and TAB.

• -E or --show-ends : Show $ at the end of each line.

• -T or --show-tabs: Display TAB characters as ^I.

• -A, --show-all: Equivalent to -vET.

• -e: Equivalent to the "-vE" option;

• -t: Equivalent to the "-vT" option;

Recommended learning: Linux video tutorial

The above is the detailed content of How to check how many processes are supported in Linux. For more information, please follow other related articles on the PHP Chinese website!