httpindex: 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/httpindex - from package: swish++

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

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