Gentoo, Knoppix and Linux Console Screenshots

2010-02-03 2 min read Linux

Finally I decided to try a few distro’s that I downloaded with Beldi.

Gentoo: Quite Small distribution. Did not configure my DHCP address and also did not start a X window also so did not try too much.

Knoppix: Well known for its recovery functions, the Live CD does discover all the hardware and boots pretty nicely to the X windows directly with the ethernet configured.
I specially liked the fact that the boot up to X window theme looked quite similar and the background did not change which is quite soothing. And no doubt the desktop background included by default is quite good.

Installing Sofware on Linux, easier and finding alternates.

2010-02-03 1 min read Linux

There are already some great blogs on this, why write another one. Let me just point you to the best one <a href="http://http://blogs.computerworld.com/installing_linux_software_101_for_windows_users" target="_blank">here.

Here are sites that will help you find the alternative to your favourite Windows programs:

<a href="http://www.osalt.com/" target="_blank">http://www.osalt.com/
<a href="http://wiki.linuxquestions.org/wiki/Linux_software_equivalent_to_Windows_software" target="_blank">http://wiki.linuxquestions.org/wiki/Linux_software_equivalent_to_Windows_software
<a href="http://www.linuxalt.com/" target="_blank">http://www.linuxalt.com/

Last access time for file

2010-02-03 1 min read C Programs Linux

The C program will print the last access time for the file.

This is quite helpfull program when you want to find old files. Modifying the source to take the filename as argument and take multiple arguments is left as an exercise.

#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <time.h>
#include <stdlib.h>
int main(void)
{
    char datestring[80];
    struct stat a;
    //int fd = open("ak",O_RDONLY);
    if (stat ("iptc.c", &a) == -1) {
        perror("stat");
        printf (" Error");
        return;
    }
    printf (" Last Access Time is %s", ctime(&a.st_atime));
    printf (" Last Access Time is %s", a.st_atime);
}

Built-in lists in vim

2010-02-03 1 min read Learning Linux Vim Tips

<a class="zem_slink freebase/en/vimscript" title="Vimscript" rel="wikipedia" href="http://en.wikipedia.org/wiki/Vimscript">Vimscript provides excellent support for operating on collections of <a class="zem_slink freebase/en/data" title="Data" rel="wikipedia" href="http://en.wikipedia.org/wiki/Data">data, a cornerstone of programming. In this third article in the series, learn how to use Vimscript’s built-in lists to ease everyday operations such as reformatting lists, filtering sequences of filenames, and sorting sets of line numbers. You’ll also walk through examples that demonstrate the power of lists to extend and enhance two common uses of <a class="zem_slink freebase/en/vim" title="Vim (text editor)" rel="homepage" href="http://www.vim.org/">Vim: creating a <a class="zem_slink freebase/en/user_defined_function" title="User-defined function" rel="wikipedia" href="http://en.wikipedia.org/wiki/User-defined_function">user-defined function to align assignment operators, and improving the built-in text completions mechanism.

Understand Awk Variables with 3 Practical Examples

2010-01-28 1 min read Learning Linux

<a id="aptureLink_CLV4LbC1Dr" style="padding: 0px 6px; float: right;" href="http://gnuwin32.sourceforge.net/packages/mawk.htm"><img style="border: 0px none;" title="Mawk for Windows" src="http://blog.amit-agarwal.com/wp-content/uploads/img.zemanta.com/ph/400x270_WebClip" alt="" width="400px" height="270px" /> This article is part of the on-going Awk Tutorial and Examples series. Like any other <a class="zem_slink freebase/en/programming_language" title="Programming language" rel="wikipedia" href="http://en.wikipedia.org/wiki/Programming_language">programming languages, Awk also has user defined variables and built-in variables. In this article let us review how to define and use <a class="zem_slink freebase/en/awk" title="AWK" rel="homepage" href="http://cm.bell-labs.com/cm/cs/awkbook/index.html">awk variables. Awk variables should begin with the letter, followed by it can consist of alpha numeric characters or underscore. Keywords […]

Quickly search and replace string with Regular expression in multiple files using perl

2010-01-27 1 min read Linux

for i in *; do perl -p -w -e ’s/a(.*)b.*/d$1e/g’ $i > temp/$i; done

for i in *; do perl -pi -w -e ’s/a(.*)b.*/d$1e/g’ $i ; done

The first one can be used when you want to preserve the original file. The redirection will cause the file with replaced string to be written to the new location in the temp directory. Modify the same according to your needs.

The second can be used to modify the files in-line. Causing overwriting the original file.

grep -v with multiple patterns.

2010-01-25 1 min read Bash Linux

$ sed '/test/{/error|critical|warning/d}' somefile If you wanted to do all in one command, you could go w/ sed instead

<a href="http://www.commandlinefu.com/commands/view/3882/grep-v-with-multiple-patterns.">View this command to comment, vote or add to favourites
<a href="http://feeds2.feedburner.com/commands/by/pipping">View all commands by <a href="http://feeds2.feedburner.com/commands/by/pipping">pipping

by David Winterbottom (<a href="http://codeinthehole.com">codeinthehole.com)

URL: <a href="http://feedproxy.google.com/~r/Command-line-fu/~3/LjKzo7FpzDU/grep-v-with-multiple-patterns.">http://feedproxy.google.com/~r/Command-line-fu/~3/LjKzo7FpzDU/grep-v-with-multiple-patterns.<h6 class="zemanta-related-title" style="font-size: 1em;">Related articles by Zemanta <ul class="zemanta-article-ul"> <li class="zemanta-article-ul-li"><a href="http://www.seroundtable.com/archives/020935.html">Google’s ”Show More Results” Plus Box (seroundtable.com) <li class="zemanta-article-ul-li"><a href="http://www.macworld.com/article/143351/2009/10/netprocesses.html?lsrc=rss_main">See which processes are using the Internet (macworld.com) <div class="zemanta-pixie" style="margin-top: 10px; height: 15px;"><a class="zemanta-pixie-a" title="Reblog this post [with Zemanta]" href="http://reblog.zemanta.com/zemified/cc60245b-7397-4d48-83b2-7bfb345ae7a9/"><img class="zemanta-pixie-img" style="border: medium none; float: right;" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/reblog_e20.png" alt="Reblog this post [with Zemanta]" /><span class="zem-script more-related pretty-attribution">