https://tieba.baidu.com/p/5768584148?red_tag=3368260634

https://my.oschina.net/idoop/blog/1927110

#bash script  增加到100w

echo "*    soft    nofile    1000000"  >> /etc/security/limits.conf
echo "*    hard    nofile    1000000"  >> /etc/security/limits.conf
echo "*    soft    nproc    1000000"  >> /etc/security/limits.conf
echo "*    hard    nproc    1000000"  >> /etc/security/limits.conf

echo "session required pam_limits.so"  >> /etc/pam.d/common-session
echo "session required pam_limits.so"  >> /etc/pam.d/common-session-noninteractive 
echo "fs.file-max = 1000000"  > /etc/sysctl.d/60-file-max.conf
echo "DefaultLimitNOFILE=1000000" >> /etc/systemd/system.conf

# for root user
echo "ulimit -SHn 1000000"  >> ~/.bashrc
echo "ulimit -u unlimited"  >> ~/.bashrc