mythtv_recording_now: 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/mythtv_recording_now - from package: mythtv-status

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

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