gatling-bench: 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/gatling-bench - from package: gatling

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