Unhide is a little handy forensic tool to find hidden processes and TCP/UDP ports by rootkits / LKMs or by another hidden technique. This tools works under both Linux / Unix, and MS-Windows operating systems. From the man page:
It detects hidden processes using three techniques:
- The proc technique consists of comparing /proc with the output of /bin/ps.
- The sys technique consists of comparing information gathered from /bin/ps with information gathered from system calls.
- The brute technique consists of bruteforcing the all process IDs. This technique is only available on Linux 2.6 kernels.
[click to continue…] Sysadmin because even developers need heroes!!!
Didn’t take long to release new updated version.
The Debian project is pleased to announce the sixth update of its stable distribution Debian GNU/Linux 4.0 (codename “etch”). This update mainly adds corrections for security problems to the stable release, along with a few adjustment to serious problems. This update has been rated as having important security impact. You are advised to upgrade system ASAP.
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RHEL 5.2 beta has been released. Red Hat engineers backport many of the new features from later kernels to the Red Hat Enterprise Linux 5 kernel, such as support for new hardware and virtualization enhancements. This provides Red Hat Enterprise Linux subscribers with important new capabilities while maintaining stable application interfaces — so that applications continue to run after new updates are installed. And, of course, itâ€™s always worth repeating that updates, which are released about twice a year, are included with every Red Hat Enterprise Linux subscription.
This will give our you a chance to see what your systems will be running later this year. You can grab beta version from RHN.
=> Press Release : Red Hat Enterprise Linux 5.2 Beta
So how do you find out how fast is your hard disk under Linux? Is it running at SATA I (150 MB/s) or SATA II (300 MB/s) speed without opening computer case or chassis?
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As many of you may already know, Google uses a version of Red Hat to power their servers, running on old kernels.
Check out Toby DiPasquale’s Google internal talk (slides). To be frank I am only aware of 2 or 4 way standard cluster system. But this is a massive parallel system build by Google for performance.
Interesting and massive stuff used by Google and powered by penguin :) (via Lyz Krumbach blog)
Simple and quick way to set up straightforward bandwidth monitoring with iptables,”Linux has a number of useful bandwidth monitoring and management programs. A quick search on Freshmeat.net for bandwidth returns a number of applications. However, if all you need is a basic overview of your total bandwidth usage, iptables is all you really need — and it’s already installed if you’re using a Linux distribution based on the 2.4.x or 2.6.x kernels” ..
Full article: online here.