apt update：只检查，不更新（已安装的软件包是否有可用的更新，给出汇总报告）
用法：sudo apt update
 
apt upgrade：更新已安装的软件包

换源

1	cp /etc/apt/sources.list /etc/apt/sources.list.bak.2023

可以手动编辑替换，也可以直接用命令

sudo bash -c "cat << EOF > /etc/apt/sources.list && apt update
deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
EOF"

更新源

1	apt-get update -y

tree 该命令用于以树状图列出目录的内容

1	apt install tree

vim

1	apt install vim

nginx

1	apt install nginx

lsof 快速查看端口号

1	apt install lsof

lrzsz 上传下载

1	apt install lrzsz

shutter：屏幕截图软件

1	apt install shutter

kazam：屏幕录制工具，集成截图和录屏功能，体积非常小。安装命令

1	apt install kazam

mpv：开源、跨平台的视频播放器

1	apt install mpv

htop：交互式的进程查看器，可以用来替换top命令

1	apt install htop