array-stride: 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/array-stride - from package: piglit

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

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