recoverjpeg: 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/recoverjpeg - from package: recoverjpeg

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

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