indiserver: 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/indiserver - from package: indi-bin

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

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