netperfmeter: 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/netperfmeter - from package: netperfmeter

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