jacktrip: 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/jacktrip - from package: jacktrip

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

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