Wikipedia on Amit Agarwal Linux Blog

Windows Vs Linux – One more time

Fri, 07 Apr 2017 07:07:25 +0000

Image via Wikipedia

One of the most written and commented articles has to be Linux vs Windows (of course there are competitors like vim vs emacs) but none has been covered so much as Linux vs Windows. So, what am I going to write here which is not covered earlier in so many other posts. Well a little different perspective 🙂

bash debug – log all executed commands

Mon, 03 Feb 2014 00:43:25 +0000

Screenshot of a Bash 3.1 session demonstrating its particularities. Shows exporting a variable, alias, type, Bash’s kill, environment variables PS1, BASH_VERSION and SHELLOPTS, redirecting standard output and standard error and history expansion. A POSIX session is launched from a normal session. Finally, the POSIX session kills itself (since just “exit” would be too boring). (Photo credit: Wikipedia)

Whenever I am writing a script in perl or bash, I always wish that there
was some way to have all the commands logged or output to screen. I know
there is “set -x” option to have debugging enabled, but sometimes that
seems to be too much information and I dont really need all that. So, here
is something I found recently for bash to log all the executed commands.

find more information on ext2/3/4 filesystem

Fri, 20 Sep 2013 00:45:11 +0000

English: Ext3 & Ext4 file systems: fsck time vs Inode Count (Photo credit: Wikipedia)

In my previous post on check filesystem regurlarly, I mentioned tune2fs. That tool give quite a lot of information. But just in case, you did not find what you are looking for in the output, then you can get much more information on these partitions with the dumpe2fs command.

Fedora – Ramdisk creation

Fri, 10 May 2013 00:40:07 +0000

In Fedora, ramdisks are not created by default as is the case with RHEL. So, if you need to get Ramdisks on Fedora, then you can do this:

sudo yum install MAKEDEV

This will create some default Ramdisk’s in the “/dev” directory. Now, if you need to change anything then feel free to go to “/etc/makedev.d” and feel free to change these files.

The Fedora Project logo (Photo credit: Wikipedia)

Allow incoming/outgoing ports on iptables

Tue, 27 Nov 2012 00:22:23 +0000

Schematic for the packet flow paths through Linux networking and Xtables (Photo credit: Wikipedia)

Last couple of years, I just used to disable iptables on my system, this time I decided not to disable it and keep it enabled.

So far so good, now comes the tricky part, I have http server enabled on my system and since this is on local network with already firewall and other security in place so I can allow all incoming to my system and similarly I need to enable XDMCP outgoing. So, I can add the rules like this :

Your own local search engine.

Mon, 09 Apr 2012 02:31:17 +0000

There are times when you would want to have a local search engine capable of indexing even pdf and doc files. So here is a solution.

You can use “Omega” and here are the instructions.

download omega from http:// xapian.org/download

yum install xapian libuuid-devel

And then make and install omega and for this you can follow the instructions.

Federated Search Engine Diagram (Photo credit: Wikipedia)

Create index using command omindex
and then you can use quest or search.py to search or you can setup the cgi way so that you can use local browser to search.

visio support comes to Linux with loads of new features of LibreOffice.

Sat, 17 Mar 2012 06:32:54 +0000

Image via Wikipedia

LibreOffice 3.5 was released few days back with loads of features and improvements. Most bragged about feature should be capability to read visio diagrams. You can read the full list of features here. And here are some interesting features:

Better UI for header/footer handling. Easily add header or footers. Quickly see what is edited with new changing text boundaries. Quickly edit or remove headers and footers without going through page styles formatting. (Cédric Bosdonnat)
New faster built-in grammar checker for English and several other languages. (László Németh)
New multi-line input bar in Calc. The arrow-control at the end of the toolbar allows to switch this on/off. (Anurag Jain, Noel Power)
Import filter for Microsoft Visio documents. (Fridrich Štrba, Eilidh McAdam, Valek Filippov)
Custom Shapes import was greatly enhanced, many bugs were fixed and new presets implementation added. (Radek Doulik)
and many more…

The Bright Future of LibreOffice (pcworld.com)
LibreOffice 3.5 Released (news.slashdot.org)
Jono Bacon: Kudos, LibreOffice (jonobacon.org)
Intel backs Libre Office by joining The Document Foundation (thetechscoop.net)

Setup your own RFC Editor for Linux.

Mon, 05 Mar 2012 11:51:54 +0000

Image via Wikipedia

Well, if you are a professional who has to keep referring to RFC, then you know how good it would be to have the RFC downloaded and kept in your computer. But then unless you can search it and use and editor with it, its of not much use. So, here is something that you can do :

Tora installation on Fedora 16 with rpm

Thu, 09 Feb 2012 05:47:04 +0000

[][1]

Image via Wikipedia

Last article I talked about tora installation from the sources, but if that is too much for you then you can use this one liner:

rpm -ivh "http://amit-agarwal.co.in/mystuff/tora-2.1.3-1.fc16.i686.rpm"

But if you like the hard way out, then you can always try this.

Unrar in Fedora… (gryphon143.wordpress.com)
Fedora Utils just got easier (funsurf.wordpress.com)
rpmorphan – deborphan for the rpm based distros. (amit-agarwal.co.in)

Blogging from N900

Mon, 19 Dec 2011 16:14:39 +0000

[][1]

Image via Wikipedia

Can´t get simpler than this. Just install the application called wordpress in your N900, and punch in the details for your blog along with your admin login and password and you have a amazing wordpress client. You can even add photos like the one below:

N900 and its applications keep me amazed and happy 🙂

Nokia N900 Gets Ice Cream Sandwich, Melts Under Pressure (pcworld.com)
N900 takes a bite out of Ice Cream Sandwich, suffers Android brain freeze (video) (engadget.com)
Android 4.0 Ice Cream Sandwich Running on the Nokia N900 (pocketnow.com)

debug call function() to debug a function in vim

Sun, 04 Sep 2011 06:04:53 +0000

Image via Wikipedia

Have you ever wished that you could either see what is going on initially at the vim startup like you could do with C program in the gdm mode, but really did not want to go through gdb. Or rather you sometime felt that some function defined by some plugin is causing some issue and you wanted to debug just that function. Well you need not wish anymore, the functionality is already there.

Installing Full Blin g theme on N900

Wed, 03 Aug 2011 03:53:57 +0000

I was going through the post : http://talk.maemo.org/showthread.php?t=46739
and found the theme quite intruging but not complete to the point where I can download the deb file and install it in /usr/share/theme/ dir with simple commands “apt-get” or at max just use mkdir command to create the dir and dump everything in that dir. So, I wrote this couple of bash one liners to copy the required files to my N900.

GPG error on N900 when doing update on command line

Wed, 22 Jun 2011 01:57:01 +0000

Image via Wikipedia

If you have added some extra repositories to your Nokia N900 and are trying to do something ( like update, install or any other apt-get operation) you might see some errors or warnings related to the GPG keys. The errors would come because the Public keys for the reporisitories are not present in the gpg database 🙂

Installing Bling Theme on N900

Sat, 18 Jun 2011 18:53:56 +0000

Image via Wikipedia

There is a very nice theme for N900 and it is called Bling theme. There is a problem though with the theme, the theme still does not have a installable .deb file, and thus the files need to be directly copied to “/usr/share/icons” and you have to manually do the mkdir and all such command in the terminal in a N900, which does not seem familiar to quite a lot of people using N900. So here, is for the benefit of all, I am posting a script that can do the job. The one lines can be run from any bash script (Linus/Windows with cygwin/Mac or even N900). Though the one liners should be self explanatory, if you have a doubt, feel free to ping me.

How To Quickly Check If You’re Running A Javascript Enabled Browser

Sun, 18 Jul 2010 13:38:48 +0000

<a href="http://www.makeuseof.com/tag/what-is-javascript-how-works">Javascript is an integral part of <a class="zem_slink" title="Web browser" rel="wikipedia" href="http://en.wikipedia.org/wiki/Web_browser">web browsing and a lot of websites use Javascript for <a class="zem_slink" title="Web application" rel="wikipedia" href="http://en.wikipedia.org/wiki/Web_application">web applications and functions. A question I get at AskTheAdmin.com often is how I can tell if I am using a Javascript enabled browser. I have two quick methods to tell if the browser you are using does or does not support Javascript.

coproc help - a new feature in bash

Mon, 10 May 2010 15:07:45 +0000

: Image via Wikipedia

In the <a class="zem_slink freebase/en/bash" title="Bash" rel="homepage" href="http://tiswww.case.edu/php/chet/bash/bashtop.html">bash version 4.0, there is a new concept called coproc. This is very useful for some of the daily tasks.

co-<a class="zem_slink freebase/guid/9202a8c04000641f800000000005a409" title="Process (computing)" rel="wikipedia" href="http://en.wikipedia.org/wiki/Process_%28computing%29">process starts a process in the background, optionally with a NAME, with which other processes can communicate. This can be a very <a class="zem_slink freebase/en/substitute_good" title="Substitute good" rel="wikipedia" href="http://en.wikipedia.org/wiki/Substitute_good">good substitution for <a class="zem_slink freebase/guid/9202a8c04000641f800000000048fac5" title="Pipeline (Unix)" rel="wikipedia" href="http://en.wikipedia.org/wiki/Pipeline_%28Unix%29">pipes in lots of cases. You can learn more about coproc in the link below:

Opens Four Google Frames At Once

Sat, 19 Dec 2009 07:51:49 +0000

: Image via Wikipedia

Googlegooglegooglegoogle: Opens Four <a class="zem_slink" title="Google" rel="homepage" href="http://google.com">Google Frames At Once Googlegooglegooglegoogle (that is Google times 4!) is a simple <a class="zem_slink" title="Website" rel="wikipedia" href="http://en.wikipedia.org/wiki/Website">website/<a class="zem_slink" title="Homepage" rel="wikipedia" href="http://en.wikipedia.org/wiki/Homepage">startpage that puts four Google search windows in one page. It basically displays four frames so that you do not have to leave the page to search simultaneously. This tool is incredibly useful for Google power searchers.
<img src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/g4_thumb.png" alt="" align="bottom" />

Wikipedia on Amit Agarwal Linux Blog

Windows Vs Linux – One more time

bash debug – log all executed commands

find more information on ext2/3/4 filesystem

Fedora – Ramdisk creation

Related articles

Allow incoming/outgoing ports on iptables

Your own local search engine.

visio support comes to Linux with loads of new features of LibreOffice.

Related articles

Setup your own RFC Editor for Linux.

Tora installation on Fedora 16 with rpm

Related articles

Blogging from N900

Related articles

debug call function() to debug a function in vim

Installing Full Blin g theme on N900

GPG error on N900 when doing update on command line

Installing Bling Theme on N900

How To Quickly Check If You’re Running A Javascript Enabled Browser

coproc help - a new feature in bash

Opens Four Google Frames At Once