tomahawk: 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/tomahawk - from package: python-tomahawk

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

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