blenderplayer: 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/bin/blenderplayer - from package: blenderplayer

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

On Debian possible default full paths are:

/usr/bin/blenderplayer - from package: blender

You may install the required package with command apt-get install {package}

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