jpegjudge: 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/jpegjudge - from package: jpegjudge

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

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