centos设备性能优化

修改dns

vi /etc/resolv.conf

nameserver 114.114.114.114

修改防火墙 设置出网ip（自己更改网卡名和IP地址）

iptables -t nat -A POSTROUTING -o enp1s0 -j SNAT –to-source 0.0.0.0

安装基本工具

[root@localhost ~]# tar xvf optimization_init.tar.gz

[root@localhost ~]# cd optimization_init/

[root@localhost optimization_init]# ./optimization_init.sh

1. Going to set new hostname…. ##修改主机名

Are you sure to do that(Y/n)

2. Going to install Base and Development Tools…. ##安装基本工具和开发工具

Are you sure to do that(Y/n)

3. Going to install snmpd…. ##安装监控 snmpd服务

Are you sure to do that(Y/n)

4. Going to shutdown selinux ##是否关闭selinux–selinux的主要作用是限制root用户对操作系统中资源的操作权限

Are you sure to do that(Y/n)

5. Going to Change ssh port to 9777…… ##修改ssh端口为9777

Are you sure to do that,if is Thunder Server,please choose No(Y/n)

6. Going to Adjust time…… ##调整时间

Are you sure to do that(Y/n)

7. Going to change encoding ##更改编码

Are you sure to do that(Y/n)

8.Going to setup zebra ##设置zebra

Are you sure to do that(Y/n)

9. Going to Optimize for better performance…… ##优化模块

Are you sure to do that(Y/n)

10. Going to setup_icmp_mss…… ##通过iptables控制ICMP

Are you sure to do that(Y/n)

11. Going to create ssh keys…… ##修改ssh密码

Are you sure to do that(Y/n)

12. Going to del home other user…… ##删除其他用户

Are you sure to do that(Y/n)

13. Going to drop mem_caches…… ##删除内存缓存

Are you sure to do that(Y/n)

14. Going to install pptpd…… ##安装pptpd服务

Are you sure to do that(Y/n)

15. Going to install telnet…… ##安装telnet服务

Are you sure to do that(Y/n)

16. clean this optimization_init…… ##删除

Are you sure to do that(Y/n)

第11项一直回车就行

setup 设置开机启动项

（crond,cups,iptables,network,rsyslog,telnet,sshd,zebra,xinetd）

需要开启

最后重启设备

下载链接：https://download.csdn.net/download/qq_32860517/20448537
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原文链接：https://blog.csdn.net/qq_32860517/article/details/119058022