Right way to colorize ls?

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http://askubuntu.com – Sometimes ago, I used Ubuntu and had colorized ls, grep "out of the box". Now I install KUbuntu and ls is plain text by default. I tried to discover something about it and notice that there is /etc/skel/.bashrc, which provide aliases to colorize ls, grep and something else, but seems it's not executed now. What should I do to make it work? (HowTos)