rasort: 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/rasort - from package: argus-client

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

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