Modify the maximum number of connections on CentOS

Use the following command to view the current maximum number of connections:

# ulimit -n 
1024

Modify the following configuration files:
Edit /etc/security/limits.conf

# vi /etc/security/limits.conf


* soft nofile 10240 
* hard nofile 10240 
* soft nproc 10240 
* hard nproc 10240 
Add the above content to the configuration file

Edit /etc/pam.d/login

# vi /etc/pam.d/login 
session required pam_limits.so 
Add the above content

to Save the above, then restart the server , then use ulimit -n
# ulimit -n 
10240