direwolf: 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/direwolf - from package: direwolf

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

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