curl ifconfig.me/ip
curl https://speedtest.selectel.ru/100MB -o/dev/null
 curl --connect-to ::speedtest.selectel.ru https://manifest.googlevideo.com/100MB -k -o/dev/null
 
#test mail
echo "This is a test message sent from postfix on my Proxmox Server" | mail -s "Test Email from Proxmox" test@gmail.com