hxprune: 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/hxprune - from package: html-xml-utils

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

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