sudo vim /etc/security/limits.conf
文件尾追加
* hard nofile 1000000
* soft nofile 1000000
修改系統最大連接數
sysctl -a | grep somaxconn
echo '
net.core.somaxconn = 2048
# 處理TIME_WAIT數量過多
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
' >> /etc/sysctl.conf
sysctl -p
二、添加用戶
sudo useradd jtsa -m -s /bin/bash
sudo passwd jtsa
sudo usermod -a -G wheel jtsa
sudo useradd jtserver -m -s /bin/bash
sudo passwd jtserver
sudo usermod -a -G wheel jtserver
sudo useradd jtjt -m -s /bin/bash
sudo passwd jtjt
三、修改ssh登錄
sudo vi /etc/ssh/sshd_config 允許密碼登錄
將PasswordAuthentication改爲yes
將Port改爲36000
sudo service ssh restart
四、修改hostname
sudo vi /etc/hostname改爲centos-base
生效hostname sudo hostname -F /etc/hostname
重新登錄