dbadb: 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/dbadb - from package: dballe

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

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