dbs_update: 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/dbs_update - from package: libdbix-easy-perl

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

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