indi_simulator_telescope: 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/indi_simulator_telescope - from package: indi-bin

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

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