[pas]

Well, since busybox containers have neither I just use cat - > target.sh copy-paste the thing then Ctrl-D.

Much cleaner, simpler experience compared to VSCode's SFTP plugin, that - for some reason - always logs an error, even though the upload completed successfully...

[gnubison]

Busybox vi is definitely a thing … but even then it probably has ed.

[RealStickman_]

You could use emacs to connect over ssh. ;)