httpcfg: 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 CentOS possible default full paths are:

/usr/bin/httpcfg - from package: mono-web

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/httpcfg - from package: mono-devel

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

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