intel_framebuffer_dump: 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/intel_framebuffer_dump - from package: intel-gpu-tools

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

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