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

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