jsonunpipe: 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/jsonunpipe - from package: python-jsonpipe

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

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