$ ip addr | awk '/state UP/ {print $2}' | sed 's/.$//'

输出结果

eth0
eth1

printf '%(%FT%T)T\n' 1606752450

无需perl, awk, 或 /usr/bin/date，bash内置"printf"函数就能搞定。

ubuntu21.04可以通过PPA源的方法安装gnome40，方法如下：

sudo add-apt-repository ppa:shemgp/gnome-40  #添加PPA源
sudo apt install mutter gnome-shell 
sudo apt upgrade

安装完成后重启系统，在会话选择中选择GNOME即可进入。

v2rayA是一款Project V的Linux Web GUI客户端，支持V2Ray，Xray，SS，SSR，Trojan和Pingtunnel

将内网网卡名改为"lan"，将外网网卡名改为"wlan"

REM copyright unixetc.com

@echo off
set /p input=a:内网/b:外网/c:禁用/d:开启

if "%input%"=="a" goto MA
if "%input%"=="b" goto MB
if "%input%"=="c" goto MC
if "%input%"=="d" goto MD
if not "%input%"== "a" (if not "%input%"=="b"(if not "%input%"=="c" (if not "%input%"=="d" goto ME)))

:MA
echo 单开内网
netsh interface set interface "lan" enabled
netsh interface set interface "wlan" disabled
ping 133.64.8.1 -n 10
echo 设置完成!
pause>nul
exit

:MB
echo 单开外网
netsh interface set interface "lan" disabled
netsh interface set interface "wlan" enabled
ping baidu.com -n 10
echo 设置完成!
pause>nul
exit

:MC
echo 禁用网络
netsh interface set interface "lan" disabled
netsh interface set interface "wlan" disabled
echo 设置完成!
pause>nul
exit

:MD 
echo 开启网络
netsh interface set interface "lan" enabled
netsh interface set interface "wlan" enabled
echo 设置完成!
pause>nul
exit

:ME
echo 啥都没干，退下!
pause>nul
exit