sized-texture-format-channels: 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/sized-texture-format-channels - from package: piglit

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

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