echo $0								## 切换 sh

systemctl status firewalld.service 	## 查看防火墙服务

cat /etc/passwd | shadow			## 查看用户

history -c							## 清除 bash 历史记录

systemctl --type==service			## 查看系统所有服务

uname								## 查看系统版本

ifconfig eth0 down					## 关闭网卡

ifconfig eth0 up					## 开启网卡

touch proxy_on.sh

#!/bin/bash

gsettings set org.gnome.system.proxy mode 'manual'

gsettings set org.gnome.system.proxy.http host '192.168.2.107'

gsettings set org.gnome.system.proxy.http port 10809

gsettings set org.gnome.system.proxy.https host '192.168.2.107'

gsettings set org.gnome.system.proxy.https port 10809

echo "系统代理已开启"

touch proxy_off.sh

#!/bin/bash

gsettings set org.gnome.system.proxy mode 'none'

echo "系统代理已关闭"

sudo apt-get update