sat: 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/sat - from package: sat-xmpp-core

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

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