1# alpine
 2
 3apk add xxx --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community
 4
 5# networking
 6
 7tcpdump -i <interface>
 8tcpdump -i <interface> arp -n -vvv
 9ip a | grep inet
10
11# keys
12
13ssh-keygen -t ed25519 -C "<host>@erock.io"
14age-keygen -o xxx.txt