ytnefprint: 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/ytnefprint - from package: ytnef

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

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