jmeter: 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/jmeter - from package: jmeter
/usr/share/jmeter/bin/jmeter - from package: jmeter

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

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