using gnuplot for time plotting

Couple of days back, I was working with some data and wanted to plot it. I had couple of options Excel, ploticus and then our own gnuplot. My choice here was gnuplot, as this is most commonly available and helps me write scripts that can automate my repetitive task. So far, so good. The data I was plotting was against time, that was the problem. Couple of quick searches did not result into any luck to get me on the path and hence with some man pages and some documentation, finally I found this, might be this will be helpful for others.

some bash exercise for you

Here is some teaser for you, can you figure out how this works:

  <td>
    <div class="text codecolorer">
      echo ls<br /> <br /> !!:1-$
    </div>
  </td>
</tr>

Related articles

• ovigia: #tips: #Bash Shell Scripts and Tutorials | BashShell.net (bashshell.net)
• perl is faster than bash in some cases. (amit-agarwal.co.in)
• bash math (amit-agarwal.co.in)

Happy Valentines day to all.

[][1]

Happy Valentines to all.

Free, But Not Full-Featured Photo editor

http://www.linuxworld.com/reviews/2010/111710-photo-editor-free-but-not.html

Photo! Editor: Free, But Not Full-Featured This free photo editor produces nice images easily, but can’t print or share. By Sally Wiener Grotta and Daniel Grotta, PC World November 16, 2010 07:21 PM

Photo! Editor (free) is an interesting combination of easy-to-use image editing tools that can produce good results for the person who wants to simply clean up their photos, though the program does have highly limited functionality.

analyze debug queries output for wordpress

Some time back, my website became too slow and I started getting timeout response for quite a lot of my pages. When I analyzed things, I found the issue was with the DB queries taking a lot of time. So, I thought of getting my hands dirty and started with installing the plugin “Debug Queries”. Just in case, you don’t know about the plugin, it lists all the queries to DB along with the time taken for the query when a Admin user visits any page.

bash regular expressions

Here are some quick links on bash regular expressions, pretty good links to bookmark, if you use, regular expressions in bash regularly. I especially like the tldp link at number 3.

http://www.linuxjournal.com/content/bash-regular-expressions
http://www.ibm.com/developerworks/library/l-bash.html
http://tldp.org/LDP/abs/html/parameter-substitution.html#VARMATCH
http://wellington.pm.org/archive/200005/codegen/index9.htm

Related articles

• Renaming a whole bunch of files at once, in bash (ask.metafilter.com)
• bash math (amit-agarwal.co.in)
• Efficiency of regular expressions (johndcook.com)
• Autogenerate Regular Expressions with txt2re (readwriteweb.com)

vino – connect to running GNome session like RDP

One thing that all of us Linux users have probably missed is connecting to the running GNome session to see what is going on in the running session. This can be quite handy in couple of situations:

1. Debugging remote sessions – where you do not want a new session, instead want to connect to running session.

2. Maintaining running session from another PC. If you are running some applications on some Linux box and want to gracefully stop it using some commands other than kill -9 then it is best that you connect to the running session, if you are not using screen.

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