tomahawk-rsync3: 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/tomahawk-rsync3 - from package: python3-tomahawk

You may install the required package with command apt-get install {package}
Error in other languages:
tomahawk-rsync3: bevel nie gevind nie
tomahawk-rsync3: comandă negăsită
tomahawk-rsync3: comando não encontrado
tomahawk-rsync3: commande introuvable
tomahawk-rsync3: command not found
tomahawk-rsync3: käsku ei ole
tomahawk-rsync3: không tìm thấy lệnh
tomahawk-rsync3: komanda nerasta
tomahawk-rsync3: Kommando nicht gefunden.
tomahawk-rsync3: kommandot finns inte
tomahawk-rsync3: komut yok
tomahawk-rsync3: nie znaleziono polecenia
tomahawk-rsync3: níor aimsíodh an t-ordú
tomahawk-rsync3: no se encontró la orden
tomahawk-rsync3: no s'ha trobat l'ordre
tomahawk-rsync3: opdracht niet gevonden
tomahawk-rsync3: parancs nem található
tomahawk-rsync3: perintah tidak ditemukan
tomahawk-rsync3: príkaz nenájdený
tomahawk-rsync3: příkaz nenalezen
tomahawk-rsync3: команда не найдена
tomahawk-rsync3: командата не е открита
tomahawk-rsync3: 命令找不到
tomahawk-rsync3: コマンドが見つかりません