mythtv-status: command not found

Have You tried accessing the binary with the full path?

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-status - from package: mythtv-status

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