serverobserver: 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/serverobserver - from package: qmf-examples

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

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