时间:2024-10-18 来源:网络 人气:
随着服务器应用的日益复杂,系统优化成为保证服务器稳定性和性能的关键。本文将详细介绍CentOS 7系统的优化方法,帮助您提升系统性能和安全性。
为了提高软件安装速度,首先需要更新系统源。以下是更换为阿里云源的方法:
下载repo文件:
```bash
wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/Centos-7.repo
wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-7.repo
备份原有的repo文件:
```bash
cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.bak
执行yum源更新:
```bash
yum clean all 清除yum缓存
yum makecache 重建缓存
yum update 升级Linux系统
开启SYN Cookies:
```bash
echo 'net.ipv4.tcp_syncookies = 1' >> /etc/sysctl.conf
sysctl -p
调整TCP窗口大小:
```bash
echo 'net.ipv4.tcp_window_scaling = 1' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_max_window = 65535' >> /etc/sysctl.conf
sysctl -p
关闭NTP服务:
```bash
systemctl disable chronyd
关闭防火墙:
```bash
systemctl disable firewalld
关闭SELinux:
```bash
setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
修改文件属性,最低权限原则:
```bash
chmod 700 /bin/rpm
chmod 664 /etc/hosts
chmod 644 /etc/passwd
chmod 644 /etc/exports
chmod 644 /etc/issue
chmod 664 /var/log/wtmp
chmod 664 /var/log/btmp
chmod 644 /etc/services
chmod 600 /etc/shadow
chmod 600 /etc/login.defs
chmod 600 /etc/hosts.allow
chmod 600 /etc/hosts.deny
chmod 600 /etc/securetty
chmod 600 /etc/security
chmod 600 /etc/ssh/sshhostkey
chmod 600 /etc/ssh/sshdconfig
chmod 600 /var/log/lastlog
chmod 600 /var/log/messages
锁定关键系统文件:
```bash
chattr +i /etc/passwd
chattr +i /etc/shadow
chattr +i /etc/group
chattr +i /etc/gshadow
通过以上优化方法,可以有效提升CentOS 7系统的性能和安全性。在实际应用中,还需根据具体需求进行调整和优化。