cdb: 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/cdb - from package: tinycdb

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

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