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My random Ramblings

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Some useful bash hacks

Useful Bash Hacks

So, listed below are some of my favorite bash commands that I use very frequently.

1) Move all files of a particular type in a directory

The command below searches for all the zip files in a particular directory hierarchy and moves it to a new directory. The depth of the search can be adjusted with the maxdepth option for the find command. I often use this to clean up my Desktop.

find ./ -name “*.zip” -exec mv {} ./zipped_files    \;

For all files in a the current directory and to ignore sub-directories  –

find ./ -name “*.zip” -maxdepth 1 exec mv {} ./zipped_files    \;

2) Modify each line in a text file

The sed command is pretty useful for all kinds of stream editing. Lets say I want to surround each line in a file with a html tag. This can be easily done via the sed command. Lets say I want enclose an XML tag for each line in a text file, sed makes this pretty easy.

Input File


1

2

3

4

The command which I am going to use is


sed 's:.*:<id>&</id> sample.txt > new_file.txt

And the output file would be


<id>1</id>
<id>2</id>
<id>3</id>
<id>4</id>

3) Cut command Example

Again, this is a pretty common hack. List all users in the system along with their home directories


cut -d : -f 1,6 /etc/passwd


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Playing around with Ubigraph-NetworkX Library in Python

I have been interested in social media visualization for quite some time. I was looking for some great visualization tools for python based graphs. I was extremely impressed by Ubigraph’s Visualization tools (http://ubietylab.net/ubigraph/). It has a pretty awesome graph visualization UI. the coolest thing which python users will love about will be its integration to another awesome graph library in Python (http://networkx.lanl.gov/). It is a great tool for modeling complex networks.These two tools are gonna make hacking social media data so much fun 🙂

In my next post we’ll see a use a simple script to visualizing twitter data as interactive graphs

Liverpool Vs Chelsea :)

I just finished watching the Liverpool kicking Chelsea’s ass and as Red’s fan, I could ‘nt have asked for something better 🙂 .!! And What a Match it was ..!!! Chelsea having bought some of the two best Ex-Liverpool players in Torres and Mereiles and still getting a goal scored against them by Glenn Johnson was one of the biggest ironies:) ..!! Kenny Dalglish made an awesome first team lineup in choosing Rodriguez over Downing and how well did it pay off 🙂 . Well a great day to be a Reds’ Fan.

YNWA ..!!!!

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