Changes

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Package Management

[http://www.rpm.org/max-rpm/rpm.8.html rpm]<br>

[http://man7.org/linux/man-pages/man8/yum.8.html yum]<br>

[http://linux.die.net/man/1/nslookup nslookup]<br>

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[http://unixhelp.ed.ac.uk/CGI/man-cgi?gzip gzip, gunzip]<br>

[http://unixhelp.ed.ac.uk/CGI/man-cgi?grep grep]<br>