Find OS version

debian

            $ lsb_release -a
            No LSB modules are available.
            Distributor ID:	Debian
            Description:	Debian GNU/Linux 7.6 (wheezy)
            Release:	7.6
            Codename:	wheezy
            

Scraping Web Sites

wget can get a local copy of a url.

            wget  --convert-links --adjust-extension --page-requisites --no-parent http://www.guitaralive.org/playlist_14_31.html
            
            wget  --convert-links --adjust-extension --page-requisites --no-parent http://www.cpr.org/classical/playlist
            

HTML Tidy can be used as part of editing the scraped HTML

• HTML Tidy Online

Archive and Compression

7zip tar archives

            apt-get install p7zip-full
            7z a archive.tar.7z archive.tar