Luke Sheppard's blog about information security, web development, and hacking 

Home Blog Archive for category "How-to"

SHA1 Hashes of Very Large Files

SHA-1 has been widely disparaged for security reasons, but it is just fine for checking file integrity. But like all things in computer science, when the files get really large

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Verifying a Checksum…Forever

Recently, I finally bothered to learn the proper way to verify checksums via command line instead of just eyeballing checksum output compared with the checksum supplied with the file. Lets

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Great discussion about passwords inside scripts

Here’s a link to a great discussion I started on Stack Exchange’s security site: How can I avoid putting the database password in a perl script? Here is the question

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How to use and understand “whois” in its many forms

    The whois command line utility, available on all modern Unix and Linux variants, can be a fast, concise, and scriptable way to identify unknown and distant hosts, networks,

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