dosage: 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/dosage - from package: dosage

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

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