Recently I have the need to ssh into some machine running “Restricted Shell” of IBM products, like restricted Bash for HMC and ksh for VIOS.
The handy “ssh-copy-id” won't work cos no cd and redirection is alloewd. But it is still do-able with a lil'bit manual labor.

Just use scp to get this done:

#!/bin/sh
# Append ssh pub key to IBM restricted shells, like hmc and vios
# Suppose entry exist on .ssh/config
scp $1:.ssh/authorized_keys2 ~/.ssh/tmp_key_$1
cat ~/.ssh/id_rsa.pub >> ~/.ssh/tmp_key_$1
scp ~/.ssh/tmp_key_$1 $1:.ssh/authorized_keys2

The tricky thing is that pub key filename is “authorized_keys2”. Maybe to avoid some stupid scanner…