rconsole-user: 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/rconsole-user - from package: remote-tty

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

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