hpcd: 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/hpcd - from package: hfsplus

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

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