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服务器一键优化脚本，高亮显示linux

内容：关闭selinux、时间同步设置、永久静态路由天添加、经常使用软件安装centos

高并发参数调优：文件句柄数调优、防火墙表空间调优bash

测试环境：centos6服务器

#/bin/bash并发

echo "####start shutdown selinux########"ide

sed -i 's/SELINK=enforcing/SELINK=disabled/' /etc/selinux/config高并发

setenforce 0测试

value_selinux=`getenforce`优化

if [ value_selinux="Permissive" ];thenunix

echo -e "\033[32m selinux has successsfully shutdown！\033[0m"

else

echo -e "\033[31m selinux has no shutdown \033[0m"

fi

echo ""

echo "###########start crontab set##########"

echo "0 0 * * * /usr/sbin/ntpdate pool.ntp.org > /dev/null 2>&1" >>/var/spool/cron/root

echo -e "\033[32m crontab has been added successfully \033[0m"

echo ""

echo ""

echo "############Add service to system boot#########"

echo "ulimit -SH 65535" >>/etc/rc.local

echo "1. change ulimit to 65535 success"

echo "route add -net 10.10.0.0/24 gw 10.0.0.30" >/etc/sysconfig/static-routes

echo -e "\033[32m add *** route successfully \033[0m"

echo ""

echo "##########open file handel to 65535#######"

echo "* soft nproc 65535" >>/etc/security/limits.conf

echo "* hard nproc 65535" >>/etc/security/limits.conf

echo "* soft nofile 65535" >>/etc/security/limits.conf

echo "* hard nofile 65535" >>/etc/security/limits.conf

echo -e "\033[32m file handel has been successfully changed \033[0m"

echo ""

echo "##########iptables optimization#####"

echo "net.nf_conntrack_max=2097152" >>/etc/sysctl.conf

sysctl -p

echo -e "\033[32m iptables optimization successful \033[0m"

echo "###### install software"

yum install dos2unix telnet lrzsz -y