How to set the number of user handles and user processes in CentOS?

CentOS sets the number of user handles and the number of user processes

1. Number of user handles

vi /etc/security/limits.conf Add

at the end of the file

# My add
* softcore unlimit
* hardcore unlimit
* softfsizeunlimited
* hardfsizeunlimited
* softdata unlimited
* harddata unlimited
* softnproc65535
* hardnproc63535
* softstackunlimited
* hardstackunlimited
* softnofile409600
* hardnofile409600 

2. Number of user processes

vim /etc/security/limits.d/90-nproc.conf

Change 1024 to 4096. By default, ordinary users are 1024. There is no limit for root

*softnproc 4096
root softnproc unlimited

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