mono-configuration-crypto: 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/mono-configuration-crypto - from package: mono-devel

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

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