netgenerate: 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/netgenerate - from package: sumo

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

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