jd: 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/jd - from package: jd

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