dadadodo: command not found

Have You tried accessing the binary with the full path?

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/dadadodo - from package: dadadodo

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