fsck.hfs: 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:

/sbin/fsck.hfs - from package: hfsprogs

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