dba: 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 CentOS possible default full paths are:

/usr/bin/dba - from package: wise2

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/dba - from package: wise

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

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