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

步骤解读：

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/etc/security/limits.d/90-nproc.conf 与 /etc/security/limits.conf 都是系统用户资源配置文件

/etc/security/limits.d/90-nproc.conf 配置文件：

[root@ ~]# cat /etc/security/limits.d/90-nproc.conf
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

*          soft    nproc     1024
root       soft    nproc     unlimited

系统其它普通用户最多进程默认是1024个，而root用户是 unlimited(不受限制）

/etc/security/limits.conf 配置文件可限制文