hivexget: command not found

Have You tried accessing the binary with the full path?

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/hivexget - from package: hivex

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

On Debian possible default full paths are:

/usr/bin/hivexget - from package: libhivex-bin

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