dbfilevalidate: 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/dbfilevalidate - from package: perl-Fsdb

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

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