jack_meter: 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/jack_meter - from package: jackmeter

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