noindex: command not found

Have You tried accessing the binary with the full path?

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/noindex - from package: noweb

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