htc: 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/htc - from package: httptunnel

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

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