rsh-redone-rsh: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/rsh-redone-rsh - from package: rsh-redone-client

You may install the required package with command apt-get install {package}

Error in other languages:
rsh-redone-rsh: bevel nie gevind nie
rsh-redone-rsh: comandă negăsită
rsh-redone-rsh: comando não encontrado
rsh-redone-rsh: commande introuvable
rsh-redone-rsh: command not found
rsh-redone-rsh: käsku ei ole
rsh-redone-rsh: không tìm thấy lệnh
rsh-redone-rsh: komanda nerasta
rsh-redone-rsh: Kommando nicht gefunden.
rsh-redone-rsh: kommandot finns inte
rsh-redone-rsh: komut yok
rsh-redone-rsh: nie znaleziono polecenia
rsh-redone-rsh: níor aimsíodh an t-ordú
rsh-redone-rsh: no se encontró la orden
rsh-redone-rsh: no s'ha trobat l'ordre
rsh-redone-rsh: opdracht niet gevonden
rsh-redone-rsh: parancs nem található
rsh-redone-rsh: perintah tidak ditemukan
rsh-redone-rsh: príkaz nenájdený
rsh-redone-rsh: příkaz nenalezen
rsh-redone-rsh: команда не найдена
rsh-redone-rsh: командата не е открита
rsh-redone-rsh: 命令找不到
rsh-redone-rsh: コマンドが見つかりません