http://www.itworld.com/sandra-henry-stocker-0 xx http://www.itworld.com/operating-systems/85055/solaris-tip-have-your-files-changed-since-installation One way to check the integrity of files on your Solaris systems is by comparing their ownership, sizes and checksums against their original values. You don't need expensive application software to do basic integrity checking. One easy and free way to do this is to take advantage of a file that your system maintains on your behalf and a command called pkgchk. http://www.itworld.com/operating-systems/85055/solaris-tip-have-your-files-changed-since-installation#comments IT management/strategy Operating systems How-to /var/sadm/install/contents checksum file size installation Sandra Henry-Stocker Wed, 18 Nov 2009 13:16:58 -0500 Sandra Henry-Stocker 85055 at http://www.itworld.com http://www.itworld.com/it-managementstrategy/84391/looping-easy-way One of the nice things about writing a column every week is that I don't often have to tackle the really big issues -- such as why Unix is still the best OS or which big company is buying which other big company and how this is going to affect all of us. Instead, I can hone in on an issue as small and personal as how you loop through a sequence of values in a script. Speaking of looping, I've just learned (and then implemented) a new trick. http://www.itworld.com/it-managementstrategy/84391/looping-easy-way#comments IT management/strategy Operating systems How-to generate list loop counter Sandra Henry-Stocker seq command Wed, 11 Nov 2009 12:51:08 -0500 Sandra Henry-Stocker 84391 at http://www.itworld.com http://www.itworld.com/it-managementstrategy/83437/grepping-whole-words If every time you grep for a specific word or string, you get a pile of lines that don't match what you were looking for, maybe it's time to learn about whole word searching. In today's column, we examine two ways to get what you want, the whole of what you want and nothing but what you want. http://www.itworld.com/it-managementstrategy/83437/grepping-whole-words#comments IT management/strategy Operating systems How-to grep -w regular expression Sandra Henry-Stocker whole words Tue, 03 Nov 2009 17:55:36 -0500 Sandra Henry-Stocker 83437 at http://www.itworld.com http://www.itworld.com/tech-amp-society/82470/your-web-site-under-attack If you have a web site, the answer is undoubtedly "yes". Someone somewhere or, more likely, quite a few someones are attempting to attack your site or the system on which it is running. Assuming hackers have found your site and are testing it for holes that they might crawl through, let's take a look at how you can uncover evidence of their exploits with a quick examination of your web logs. http://www.itworld.com/tech-amp-society/82470/your-web-site-under-attack#comments Security How-to buffer overflow Perl Sandra Henry-Stocker SQL injection web logs Mon, 26 Oct 2009 19:24:27 -0400 Sandra Henry-Stocker 82470 at http://www.itworld.com http://www.itworld.com/it-managementstrategy/81833/easy-email-filtering-procmail Tossing email into the /dev/null bit bucket is fine when you know the account in question will never receive any valid form of email. You can, however, get a much finer degree of control over email and still automate the cleanup of spam by using a tool such as procmail. Procmail is a basic email filter and not nearly as difficult to set up as people imagine. Let's run through the setup and focus on a couple potential stumbling blocks. http://www.itworld.com/it-managementstrategy/81833/easy-email-filtering-procmail#comments IT management/strategy Open Source How-to .forward email filtering procmail Sandra Henry-Stocker sendmail Wed, 21 Oct 2009 13:13:42 -0400 Sandra Henry-Stocker 81833 at http://www.itworld.com