db_dump185: 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/db_dump185 - from package: db4-utils

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

On Debian possible default full paths are:

/usr/bin/db_dump185 - from package: libdb1-compat

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

Error in other languages:
db_dump185: bevel nie gevind nie
db_dump185: comandă negăsită
db_dump185: comando não encontrado
db_dump185: commande introuvable
db_dump185: command not found
db_dump185: käsku ei ole
db_dump185: không tìm thấy lệnh
db_dump185: komanda nerasta
db_dump185: Kommando nicht gefunden.
db_dump185: kommandot finns inte
db_dump185: komut yok
db_dump185: nie znaleziono polecenia
db_dump185: níor aimsíodh an t-ordú
db_dump185: no se encontró la orden
db_dump185: no s'ha trobat l'ordre
db_dump185: opdracht niet gevonden
db_dump185: parancs nem található
db_dump185: perintah tidak ditemukan
db_dump185: príkaz nenájdený
db_dump185: příkaz nenalezen
db_dump185: команда не найдена
db_dump185: командата не е открита
db_dump185: 命令找不到
db_dump185: コマンドが見つかりません