bcrypt: 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/bcrypt - from package: bcrypt

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

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