statgrab-make-mrtg-index: 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

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/statgrab-make-mrtg-index - from package: statgrab-tools

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

On Debian possible default full paths are:

/usr/bin/statgrab-make-mrtg-index - from package: statgrab

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