htp: 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/htp - from package: htp

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

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