Integrit is a simple yet secure alternative to products like tripwire. It has a small memory footprint, uses up-to-date cryptographic algorithms, and has features that make sense (like including the MD5 checksum of newly generated databases in the report. You may already now the alternatives on OpenBSD or RedHat. So now let’s play with Debian :-)

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Once again, I would like to introduce a limitation software. This time, this is for network bandwidth. With trickle, you can limit upload and download of an application. Good written application embed this kind of features, but if it’s not the case it’s easy to do so with Trickle. See my documentation on Trickle to get more informations.

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In a sad scenario where an application is fully consuming CPU to limit it. To do so, you will need a magic command called Cpulimit that will help you to limit a PID to a desired percentage usage of your CPU. I’ve wrote a little documentation on cpulimit.

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I recently flushed my Google Reader stars that I had and didn’t write down since 2009. There was a huge amount of work, but I did it. Now my account could be close without any missing things. I wrote down some of tips and I share them with you : Command line email sending with attachements (French) Interesting Postfix resources Bind DNS : How to flush cache, Version security check and force zone reloading (French) How to duplicate disk : only partition table and over the network (French) Acct : adding new software informations (French) Solaris : get link aggregation informations (French) MySQL : get database size (French) Stress : CPU stressing mechanism (French) More Linux memory managment inforamtions (French) ACL (FS) : duplicate rights (French) Duplicate Debian packages to reinstall another one quickly (French) Adding iptables comments (French) Hardware performances : get an idea of componant speed (French) WordPress auto flush comments (French) Crypt SSH private key (French) Grep : show lines bofore or after search pattern (French) Nagios : avoid reminding shcedule after reboot (French) Sysstat : check processus peformances (French) I hope it will helps you :-)

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Nginx Substitutions Filter is a filter module able to do both regular expression and fixed string substitutions on response bodies. This module is quite different from the Nginx’s native Substitution Module. It scans the output chains buffer and matches string line by line, just like Apache’s mod_substitute. I’ve played with the classic substitution module but due to limitations (only one matching pattern and no regex), it wasn’t easy to do all I wanted to do.

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