cowbuilder-dist: 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/cowbuilder-dist - from package: ubuntu-dev-tools

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

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