teem-mrender: 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/teem-mrender - from package: teem-apps

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