fdo22540: 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/fdo22540 - from package: piglit

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

Error in other languages:
fdo22540: bevel nie gevind nie
fdo22540: comandă negăsită
fdo22540: comando não encontrado
fdo22540: commande introuvable
fdo22540: command not found
fdo22540: käsku ei ole
fdo22540: không tìm thấy lệnh
fdo22540: komanda nerasta
fdo22540: Kommando nicht gefunden.
fdo22540: kommandot finns inte
fdo22540: komut yok
fdo22540: nie znaleziono polecenia
fdo22540: níor aimsíodh an t-ordú
fdo22540: no se encontró la orden
fdo22540: no s'ha trobat l'ordre
fdo22540: opdracht niet gevonden
fdo22540: parancs nem található
fdo22540: perintah tidak ditemukan
fdo22540: príkaz nenájdený
fdo22540: příkaz nenalezen
fdo22540: команда не найдена
fdo22540: командата не е открита
fdo22540: 命令找不到
fdo22540: コマンドが見つかりません