stap-server: 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 CentOS possible default full paths are:

/usr/bin/stap-server - from package: systemtap-server

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

On Debian possible default full paths are:

/usr/bin/stap-server - from package: systemtap-server

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

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