volk_profile: 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/volk_profile - from package: libvolk-bin

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

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