cryptmount: 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/cryptmount - from package: cryptmount

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

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