優化系統核心參數

#!/bin/bash
echo -e "\033[36m \t\t\t 優化系統核心參數 \t\t\t \033[0m"
　　grep ‘keepalive_time = 1200‘ /etc/sysctl.conf &>/dev/null
　　if [ $? -ne 0 ];then
　　cat >> /etc/sysctl.conf <<EOF

fs.file-max = 65535
net.ipv4.ip_forward = 1
net.ipv4.tcp_synack_retries = 3
net.ipv4.tcp_max_orphans = 8192
net.ipv4.tcp_window_scaling = 03
net.ipv4.tcp_sack = 0
net.ipv4.icmp_echo_ignore_all = 1
net.core.somaxconn= 10240
vm.overcommit_memory=1
vm.swappiness = 0
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 2000

EOF

　　sysctl -p
　　fi
　　swapoff -a
　　sleep 1
　　grep ‘* soft nproc 65535‘ /etc/security/limits.conf &>/dev/null
　　if [ $? -ne 0 ];then
　　cat >> /etc/security/limits.conf <<EOF

* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535

EOF　　

　　fi
　　rc_local=`grep /var/lock/subsys/local /etc/rc.local`
　　[ -z "$rc_local" ] && sed -i ‘$atouch /var/lock/subsys/local‘ /etc/rc.local
　　sleep 1

優化系統核心參數

原文：https://www.cnblogs.com/luoqiangdong/p/14271609.html