When your computer or server has access to multiple LAN segments with different address spaces and different gateways to the Internet, there’s a nice feature called policy routing that allows you to use all of them simultaneously without having to re-configure your network topology. This is especially useful when you want to increase the bandwidth and [...]
Tag Archives: gentoo
Multiple IP uplinks with Gentoo
Posted in How-tos, Sysadmin Also tagged iproute2, linux, multihoming, policy routing, split access, vlan 2 Comments
Top 25 vulnerability RSS feeds
One way to receive up-to-date reports about vulnerability issues is subscribing to vulnerability RSS feeds: they update on demand, they don’t rely on your mail subsystem and they don’t fill up your mailbox. The only drawback is that you could miss alerts if you don’t sync your feeds for a long time, but if you’re [...]
Posted in Sysadmin, Tips Also tagged cert, checkpoint, cisco, feed, linux, Mac OS X, microsoft, nist, opensource, opml, security, securityfocus, solaris, ubuntu, vulnerability, windows 1 Comment
Linux RAID disk wipeout
A common problem with Linux software RAID (aka md) happens when you try to use a disk that was previously part of some other disk array. Symptoms include: wrong volume size, unable to add device to raid, volume UUID mismatch. To fix the problem you need to use mdadm utility on the disk to cleanup: # [...]
Gentooize Part 1: colorize console
One of the best lessons you can learn from Gentoo is you can export most of its juice to other OSes. I’ve been using Gentoo as main Linux distro since 2001. Currently I have a few setups where drawbacks of migrating to Gentoo would exceed benefits, so I decided to increase affinity by adding some [...]
Process management roundup/1
Under UNIX-like operating systems, there are several ways to manage long-running processes such as daemons. Process management is a crucial aspect of system maintainance and therefore it’s one of the aspects to take into account when planning a deployment. Since available solutions are getting more and more complex and specialized, I thought of writing a [...]