rconsole: command not found

Have You tried accessing the binary with the full path?

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

[root@server ~]# echo $PATH

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/rconsole - from package: remote-tty

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