regular expression

How do I redirect old ugly urls such as http://example.com/store/view.jsp?product=foo with clean url – http://example.com/store/view/product/foo using nginx reverse proxy?

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Recently, we moved all our static assets to a CDN as described here. However, we have over 8000+ old blog posts and we need to point static images url to our CDN account hosted at http://MyACCOUNT.cloudfront.net/images/ folder. How do I rename all image urls stored in wordpress posts? How do I offload static images to a CDN urls under Wordpress?

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How do I use the Grep command with regular expressions under Linux operating systems?

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How do I search multiple strings or words using the grep command? For example I’d like to search word1, word2, word3 and so on within /path/to/file. How do I force grep to search multiple words?

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Q. How do I remove all digits or number from my text file or input using sed command?

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Q. I’m using lighttpd under CentOS 5 and getting the following error: …can’t handle ‘$HTTP[url] =~ …’ as you compiled without pcre support. My question is What is pcre support, and how do I solve this problem? A. Pcre is nothing but Perl-compatible regular expression library. PCRE has its own native API, but a set […]

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How do I remove all (text, special characters, white spaces, tabs etc) from my text file (input) except numbers (digits) using sed command?

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