Linux换源

CentOS7

yum是CentOS的一种软件管理器，通过yum安装软件，可以自动解决包依赖的问题。
CentOS官方yum源：mirrorlist.centos.org，由于连接国外网站不稳定，无法使用。所以需要将官方yum源换为国内的yum源。这些服务器是官方源的镜像，也就是所有的软件都同步到了国内的服务器上，比如阿里云源、清华源、网易源、中科大源等等.

1.官方yum源配置文件位置：/etc/yum.repos.d/CentOS-Base.repo

cat /etc/yum.repos.d/CentOS-Base.repo
//可以先进行备份
cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2.下载阿里云源配置，覆盖源文件

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
//再次查看，发现yum源已经被替换
cat /etc/yum.repos.d/CentOS-Base.repo

# 3.清理缓存并生成新的缓存
yum clean all
yum makecache
# 更新所有软件
sudo yum -y update

debian

• 源文件位置：/etc/apt/sources.list
• 备份: cp /etc/apt/sources.list /etc/apt/sources.list.bak

更新源

apt-get update  # 更新索引
apt-get upgrade  # 更新软件
apt-get dist-upgrade  # 升级
apt-get clean  # 删除缓存包
apt-get autoclean  # 删除未安装的deb包

Kali

挑一个就好，

# 阿里云
deb https://mirrors.aliyun.com/kali kali-rolling main non-free contrib
deb-src https://mirrors.aliyun.com/kali kali-rolling main non-free contrib
# 官方源
# deb http://http.kali.org/kali kali-rolling main non-free contrib
# deb-src http://http.kali.org/kali kali-rolling main non-free contrib
#根据需要自己选一个，中科大的还可以
# 中科大
#deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
#deb-src http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
# 清华大学
#deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
#deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
# 浙大
#deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
#deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
# 东软大学
#deb http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
#deb-src http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
# 重庆大学
#deb http://http.kali.org/kali kali-rolling main non-free contrib
#deb-src http://http.kali.org/kali kali-rolling main non-free contrib

Ubuntu

#  阿里源
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
 
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
 
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
 
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
 
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse