Modify the maximum number of threads for a Linux system user limit

The Linux system has a maximum limit on the number of threads, and when the maximum number of threads to the system limit is reached, ssh to the system using the account password is unable to log in, the write Failed:broken pipe is reported, or the shell request faied on Chanel 0. Switch to the user under the root user will also error, Su Clouder, Tip: su:failed to Execute/bin/bash: Resources temporarily unavailable

$ ulimit-u

1024

You can see that the maximum number of threads is 1024

Modify the configuration of the maximum number of threads

# vi/etc/security/limits.d/20-nproc.conf

The contents are as follows:

* Soft Nproc 4096

Root Soft Nproc Unlimited

It can be seen that all users except the root user are limited to 1024, so you can fix the problem by annotating this line or changing the value to resolve the issue.

Modify the maximum number of threads for a Linux system user limit