komparator4: command not found

Have You tried accessing the binary with the full path?

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/komparator4 - from package: komparator

You may install the required package with command apt-get install {package}
Error in other languages:
komparator4: bevel nie gevind nie
komparator4: comandă negăsită
komparator4: comando não encontrado
komparator4: commande introuvable
komparator4: command not found
komparator4: käsku ei ole
komparator4: không tìm thấy lệnh
komparator4: komanda nerasta
komparator4: Kommando nicht gefunden.
komparator4: kommandot finns inte
komparator4: komut yok
komparator4: nie znaleziono polecenia
komparator4: níor aimsíodh an t-ordú
komparator4: no se encontró la orden
komparator4: no s'ha trobat l'ordre
komparator4: opdracht niet gevonden
komparator4: parancs nem található
komparator4: perintah tidak ditemukan
komparator4: príkaz nenájdený
komparator4: příkaz nenalezen
komparator4: команда не найдена
komparator4: командата не е открита
komparator4: 命令找不到
komparator4: コマンドが見つかりません