trinity-fp1: 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/trinity-fp1 - from package: piglit

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

Error in other languages:
trinity-fp1: bevel nie gevind nie
trinity-fp1: comandă negăsită
trinity-fp1: comando não encontrado
trinity-fp1: commande introuvable
trinity-fp1: command not found
trinity-fp1: käsku ei ole
trinity-fp1: không tìm thấy lệnh
trinity-fp1: komanda nerasta
trinity-fp1: Kommando nicht gefunden.
trinity-fp1: kommandot finns inte
trinity-fp1: komut yok
trinity-fp1: nie znaleziono polecenia
trinity-fp1: níor aimsíodh an t-ordú
trinity-fp1: no se encontró la orden
trinity-fp1: no s'ha trobat l'ordre
trinity-fp1: opdracht niet gevonden
trinity-fp1: parancs nem található
trinity-fp1: perintah tidak ditemukan
trinity-fp1: príkaz nenájdený
trinity-fp1: příkaz nenalezen
trinity-fp1: команда не найдена
trinity-fp1: командата не е открита
trinity-fp1: 命令找不到
trinity-fp1: コマンドが見つかりません