blender: 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/blender - from package: blender

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

On Debian possible default full paths are:

/usr/bin/blender - from package: blender

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

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