jshon: 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/jshon - from package: jshon

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

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