normbig: 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/normbig - from package: normaliz

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

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