gjacktransport: 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/gjacktransport - from package: gjacktransport

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

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