jp: 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/jp - from package: sat-xmpp-jp

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

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