dbcoldefine: 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/dbcoldefine - from package: perl-Fsdb

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

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