stap: 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 - from package: systemtap-client
/usr/bin/stap - from package: systemtap-devel

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

On Debian possible default full paths are:

/usr/bin/stap - from package: systemtap

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

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