CentOS7安装后常做的事

CentOS7安装后常做的事

配置国内yum源

删除系统自带的repo文件

cd /etc/yum.repos.d/
rm *.repo -f

使用腾讯云提供的repo文件

本文使用的是腾讯云的centos源

• 使用vi创建文件

vi centos7_base.repo

具体内容如下：

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[os]
name=Qcloud centos os - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

[updates]
name=Qcloud centos updates - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

[centosplus]
name=Qcloud centosplus - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

[cr]
name=Qcloud centos cr - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/cr/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

[extras]
name=Qcloud centos extras - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

[fasttrack]
name=Qcloud centos fasttrack - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/fasttrack/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7

• 更新缓存

yum clean all
yum makecache

关闭swap

• 临时关闭：swapoff -a，重启后会失效。
• 永久关闭：编辑文件/etc/fstab，注释swap分区那一行，然后重启服务器。

关闭 selinux

• 临时关闭：setenforce 0，重启后会失效
• 永久关闭：编辑文件/etc/selinux/config，修改SELINUX为SELINUX=disabled

关闭防火墙

# 取消开机启动
systemctl disable firewalld
# 关闭防火墙
systemctl stop firewalld

安装常用软件

yum install net-tools
yum install telnet