hxclean: 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 Debian possible default full paths are:

/usr/bin/hxclean - from package: html-xml-utils

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