How to limit the number of pseudo-terminals under Centos

This article mainly explains "how to limit the number of pseudo-terminals under Centos". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to limit the number of pseudo-terminals under Centos.

If we want to add (or limit) users who log in through ssh or telnet, we can modify kernel parameters to limit them. Here's how to limit the number of users.

Vim / etc/sysctl.conf

Increase

Kernel.pty.max = 3max / limit pseudo-terminals to 3

Execution

Sysctl-p

Ssh logs in to the remote system again, and a prompt appears when the fourth connection is opened

So as to achieve the purpose of our restriction.

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