gatling: 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/gatling - from package: gatling

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

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