CentOS系统yum源变快的好办法

CentOS系统yum源变快的好办法

在CentOS系统中，yum是包管理器，它用于安装、更新和卸载软件包。然而，有时候我们大概会遇到yum源速度慢的问题，这大概会影响到系统的维护和日常使用。以下是一些节约CentOS系统yum源速度的好方法：

1. 更换yum源

更换yum源是节约速度最直接的方法之一。以下是更换yum源的步骤：

1. 打开终端。
2. 编辑yum源配置文件。使用以下命令打开配置文件：

sudo vi /etc/yum.repos.d/CentOS-Base.repo

3. 将原有的yum源地址替换为速度较快的源地址。以下是一些国内优秀的yum源地址：

# CentOS-Base.repo
#
# The mirrorlist option will tell yum where to look for the latest updates.
# By default this is a list of mirrors so you will want to select a server that
# is geographically close to you.
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=Base&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
# 注意：以下为国内镜像源地址，可以凭借自己的需求选择
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
#baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
#baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/

4. 保存并关闭文件。
5. 运行以下命令清除缓存并更新yum源：

sudo yum clean all
sudo yum makecache

2. 优化网络配置

有时候，网络配置也大概造成yum源速度慢。以下是一些优化网络配置的方法：

1. 检查并优化DNS解析。确保你的DNS解析正确无误，可以使用以下命令检查：

ping www.baidu.com

2. 开启TCP_NODELAY选项。TCP_NODELAY选项可以优化TCP连接，减少延迟。编辑/etc/sysctl.conf文件，添加以下内容：

net.ipv4.tcp_fin_timeout = 2
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_orphans = 32768
net.ipv4.tcp_max_cache = 20480
net.core.netdev_max_backlog = 4096
net.core.somaxconn = 4096
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 87380 16777216
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 2
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_max_orphans = 32768
net.core.netdev_max_backlog = 4096
net.core.somaxconn = 4096
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 87380 16777216
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 2
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_max_orphans = 32768
net.core.netdev_max_backlog = 4096
net.core.s
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