es2_info: 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 Debian possible default full paths are:

/usr/bin/es2_info - from package: mesa-utils-extra

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

Error in other languages:
es2_info: bevel nie gevind nie
es2_info: comandă negăsită
es2_info: comando não encontrado
es2_info: commande introuvable
es2_info: command not found
es2_info: käsku ei ole
es2_info: không tìm thấy lệnh
es2_info: komanda nerasta
es2_info: Kommando nicht gefunden.
es2_info: kommandot finns inte
es2_info: komut yok
es2_info: nie znaleziono polecenia
es2_info: níor aimsíodh an t-ordú
es2_info: no se encontró la orden
es2_info: no s'ha trobat l'ordre
es2_info: opdracht niet gevonden
es2_info: parancs nem található
es2_info: perintah tidak ditemukan
es2_info: príkaz nenájdený
es2_info: příkaz nenalezen
es2_info: команда не найдена
es2_info: командата не е открита
es2_info: 命令找不到
es2_info: コマンドが見つかりません