normalform: 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/lib64/4ti2/bin/normalform - from package: 4ti2

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

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