teem-overrgb: 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/teem-overrgb - from package: teem-apps

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

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