query and downgrade selected packages based on version or repository

If you have worked on rpm based distro then you know how difficult it is to downgrade packages. And unluckily I upgraded some packages to fc12 and was still on FC11. Completely my mistake while doing some R&D. Anyway to downgrade I had to device some mechanism and here it is:

rpm -qa –qf ”%-30{NAME}%-20{RELEASE}\n” |grep fc12 |awk '{print $1}’|tr ’\n’ ’ ’ >downgrade

yum downgrade `cat downgrade`

EncFS – Simple article to use Encrypted filesystem in Linux

A nice article here

EncFS is an easy-to-use, command-line tool for storing information in encrypted form. It’s not really a file-system, but it pretends to be one at the CLI. If you’ve been searching for a means of encrypting and decrypting your sensitive data easily, here it is.
User Level: Intermediate
EncFS is included with the distribution I’m using on the desktop, Ubuntu Dapper, so all I needed to do to install it was a few clicks in Synaptic. Look for the encfs package, and select if for installation. It should pull down all of the dependencies for the system. If you’re not so lucky, and your distro doesn’t include EncFS packages, you can download the latest tarball from a here and build it from the source. See the EncFS site for a dependencies.

Ubuntu Tips – Boot Faster

<a href="http://blog.amit-agarwal.co.in/category/linux/">Bookmark this category

Ubuntu Tips – Boot Faster LinuxLinks: &#8221;With just a few modifications and some experimentation, your Ubuntu box can realise its untapped potential. We have identified 8 tips to help you achieve this. Most of the tips are really easy to implement, and are perfectly safe.&#8221;

URL: <a href="http://linuxtoday.com/news_story.php3?ltsn=2009-10-01-018-35-OS-HL-UB">http://linuxtoday.com/news_story.php3?ltsn=2009-10-01-018-35-OS-HL-UB

Finding all numbers that are bigger than 1 in vim

/^([2-9]d*|1d+)
If we have a csv like structure

The trick here is simple, lets look at the regex from the begining:

^ – start from the begining
() – start and end of block
[] – digits within this. So we are looking from 2 to 9 to exclude the numbers begining with 1
d – search for digits

• – search for one or more
  | – or operation
  1 – search for numbers begining with 1

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