innetgr: 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/innetgr - from package: ng-utils

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

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