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

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

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