dirt: 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/dirt - from package: dput-ng

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

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