dbcolsregression: 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/dbcolsregression - from package: perl-Fsdb

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

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