hc: 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/hc - from package: httpcode

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

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