jobs = lists the jobs that you are running in the background and in the foreground
bg = place a job in background
fg = continues a stopped job by running it in the foreground
Zdroj: https://linuxfrombeginning.wordpress.com/2008/09/29/linux-command-13-jobs-bg-fg-top/
http://www.abclinuxu.cz/clanky/jak-spustit-prikazy-na-pozadi-nohup-disown-screen