dbcolrename: 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/dbcolrename - from package: perl-Fsdb

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

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