xjadeo: 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
/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/xjadeo - from package: xjadeo

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