Mosly stolen from github.com/Someguy123/docker-networktools but updated for Ubuntu 22.04 and built for amd64 and arm64. See that repo for more comprehensive documentation. Includes:
bash-completion - to make bash tab completion better
command-not-found - when you type a command that doesn't exist, it informs you of which package a command is in
mtr-tiny - fast and easy to read realtime traceroutes for both IPv4 and IPv6 (tiny version skips all the GTK bloat)
dnsutils - provides tools such as dig and nslookup for DNS debugging
net-tools - basic networking tools such as ifconfig, netstat, route, arp
nmap - port scanning and other network reconnaissance
traceroute - self explanatory. alternative to mtr
netcat - nc tool. highly versatile TCP/UDP/unixsocket client and server
iproute2 - provides the ip and bridge tools for advanced network configs
tcpdump - similar to wireshark, but CLI based. for inspecting network packets
iputils-ping - for the ping command. supports both IPv4 and v6 in the same binary, instead of ping + ping6
isc-dhcp-client - DHCP client for use with macvlan or other networking scenarios. E.g: "dhclient eth0"
openssh - server and client. for testing ssh connectivity, and so you may ssh into the container for a better experience
tmux - run multiple things in one terminal session, with tabs and split windows
screen - similar to tmux, for running things in the background
vim/nano - for times when you need a text editor. remember! don't expect files on a container to be persisted. Use a volume.
lldpd - runs the LLDP protocol on the client's interfaces and allow you to see LLDP neighbors