When you're not working on a full linux distro, e.g. hacking a wifi router box or a network assisted storage box, you might not have the luxury of emacs availab

When you're not working on a full linux distro, e.g. hacking a wifi router box or a network assisted storage box, you might not have the luxury of emacs available. However, it's more likely that you will have some version of Vi. The one I'm thinking of is the Busybox version.