Ubuntu 22.04系统优化

1. 配置apt下载地址

#0.切换root用户
sudo su -

#1.备份/etc/apt/sources.list文件 到/tmp/
cp /etc/apt/sources.list  /tmp/

#2.vim编辑/etc/apt/sources.list 文件
dG #vi/vim快捷键 删除当前行到最后一行的内容.


# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
# deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# # deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse

#3.执行apt update 生成本地软件包缓存,如果不执行则下载软件失败.
apt update 

#4.安装软件
apt install -y tree  telnet  vim   lrzsz   wget    unzip cmatrix

2.配置命令行颜色

#1.切换到root 
sudo su -


#2.执行指令(针对用户的)
echo "export PS1='[\[\e[34;1m\]\u@\[\e[0m\]\[\e[32;1m\]\H\[\e[0m\]\[\e[31;1m\] \w\[\e[0m\]]\\$ '" >>~/.bashrc

#3.重新登录后检查颜色