tri-tex-crash: 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/tri-tex-crash - from package: piglit

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

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