centos定制_CentOS

CentOS是一款基于Red Hat Enterprise Linux（RHEL）源代码的免费开源操作系统，适用于服务器和桌面环境。

CentOS定制是指在CentOS操作系统基础上，根据用户的需求进行个性化设置和优化，以下是一些常见的CentOS定制方法：

1、更新系统

执行以下命令更新系统到最新版本：

“`

sudo yum update

“`

2、安装常用软件

使用yum包管理器安装常用软件，

“`

sudo yum install vim wget curl nettools

“`

3、配置网络

编辑网络配置文件/etc/sysconfig/networkscripts/ifcfgeth0，根据实际情况修改IP地址、子网掩码、网关等信息。

4、防火墙配置

安装并启动firewalld防火墙：

“`

sudo yum install firewalld

sudo systemctl start firewalld

sudo systemctl enable firewalld

“`

开放特定端口，例如开放SSH端口：

“`

sudo firewallcmd zone=public addport=22/tcp permanent

sudo firewallcmd reload

“`

5、禁用无用服务

执行以下命令禁用无用服务：

“`

sudo systemctl disable NetworkManagerwaitonline.service

sudo systemctl disable NetworkManagerdispatcher.service

sudo systemctl disable NetworkManagerdhclient.service

sudo systemctl disable NetworkManager.service

“`

6、调整内核参数

编辑内核参数配置文件/etc/sysctl.conf，根据实际情况添加或修改内核参数，

“`

vm.swappiness = 10

net.ipv4.tcp_syncookies = 1

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_fin_timeout = 30

“`

使配置生效：

“`

sudo sysctl p

“`

7、优化文件句柄数限制

编辑/etc/security/limits.conf文件，添加以下内容：

“`

* soft nofile 65535

* hard nofile 65535

* soft nproc 65535

* hard nproc 65535

“`

使配置生效：

“`

sudo sysctl p

“`

8、优化内存分配策略

编辑/etc/sysctl.conf文件，添加以下内容：

“`

vm.dirty_ratio = 60

vm.dirty_background_ratio = 10

vm.dirty_expire_centisecs = 120000000000000000000000000000000000000000000000000000000000000000000000000123456789aab123456789cdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklm