vp-ignore-input: 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/piglit/bin/vp-ignore-input - from package: piglit

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

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