find duplicate entry in a list in bash with sed

2010-06-25 1 min read Bash Fedora Learning

Here I will take an example of rss2email list, but I guess I will be able to pass on the concept.

Here is example of the output of the r2e list command:

1: http://blog.amit-agarwal.co.in/feed (default: amitag@localhost)
2: http://feeds2.feedburner.com/AllAboutLinux (default: amitag@localhost)
3: http://feeds2.feedburner.com/Command-line-fu (default: amitag@localhost)
4: http://blogs.members.freewebs.com/Members/Blogs/viewBlogRSS.jsp?userid=29731143 (default: amitag@localhost)

Target here is to get the list of all duplicate entries if any. So, first we need to remove the numbers from the begining and the email ID from the end.

bash script to change the vim colorscheme from the list of locally available schemes

2010-06-24 0 min read Bash Fedora Learning Linux Vim Tips

$\"MacVim$: Image via Wikipedia

Today I was just wondering how good it would be to have a script to change the <a class="zem_slink freebase/en/vim" title="Vim (text editor)" rel="homepage" href="http://www.vim.org/">vim colorscheme from the <a class="zem_slink freebase/en/cmd_exe" title="Command Prompt" rel="wikipedia" href="http://en.wikipedia.org/wiki/Command_Prompt">command prompt. The plan for the script was simply to print the list of available schemes and then let the user select the actions from there on. So, here is the result:

cdargs – bash cd command with bookmarks and browser.

2010-06-22 0 min read Bash Learning Linux

$\"Screenshot$: Image via Wikipedia

cdargs is a <a class="zem_slink freebase/en/bash" title="Bash" rel="homepage" href="http://tiswww.case.edu/php/chet/bash/bashtop.html">bash shell cd with bookmarks and browser. Quite useful if you are developer or someone who use’s the bash shell very frequently

Name       : cdargs

Arch : i686 Version : 1.35 Release : 5.fc12 Size : 114 k Repo : installed From repo : fedora Summary : The shell cd with bookmarks and browser URL : http://www.skamphausen.de/software/cdargs/ License : <a class="zem_slink freebase/en/gnu_general_public_license" title="GNU General Public License" rel="wikipedia" href="http://en.wikipedia.org/wiki/GNU_General_Public_License">GPLv2</a>+ Description: Enables the user to quickly change <a class="zem_slink freebase/en/working_directory" title="Working directory" rel="wikipedia" href="http://en.wikipedia.org/wiki/Working_directory">working directory</a> by navigating cd arguments : and expanding the shell built-in cd with bookmarks and browser.

List of commands you use most often

2010-06-16 1 min read Bash Learning

<span style="font-size: x-large;"><a href="http://feedproxy.google.com/~r/Command-line-fu/~3/6MxHiSiINdo/list-of-commands-you-use-most-often">List of commands you use most often

$ history | <a class="zem_slink freebase/en/awk" title="AWK" rel="homepage" href="http://cm.bell-labs.com/cm/cs/awkbook/index.html">awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head > /tmp/cmds | gnuplot -persist <(echo 'plot "/tmp/cmds" using 1:xticlabels(2) with boxes') Plot your most used commands with gnuplot.

<a href="http://www.commandlinefu.com/commands/view/5845/list-of-commands-you-use-most-often">View this command to comment, vote or add to favourites
<a href="http://feeds2.feedburner.com/commands/by/sthrs">View all commands by <a href="http://feeds2.feedburner.com/commands/by/sthrs">sthrs

Verify all the paths in the PATH directory

2010-06-08 1 min read Bash Learning Linux

Here is the command to test that all the directories in your path actually exist.

(<a class="zem_slink freebase/en/internal_field_separator" title="Internal field separator" rel="wikipedia" href="http://en.wikipedia.org/wiki/Internal_field_separator">IFS=:;for p in $PATH; do test -d $p || echo $p; done)

And the explanation :

Set the IFS to ”:”

now we loop through the PATH variable

and test all the directories with ”test -d”

Here is another version without IFS:

for i in ${PATH//:/ };do test -d $i || echo $i;done
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PuTTY alternatives - AlternativeTo.net

2010-06-04 1 min read Learning Uncategorized

Sometimes after hours of searching you find a link so good that it needs no introductions and neither any writeup. I found one such page today :

<a href="http://alternativeto.net/desktop/putty/">http://alternativeto.net/desktop/putty/<h6 class="zemanta-related-title">Related articles by Zemanta <ul class="zemanta-article-ul"> <li class="zemanta-article-ul-li"><a href="http://www.downloadsquad.com/2010/05/18/kitty-is-win32-native-putty/">KiTTY is Win32-native PuTTY (downloadsquad.com) <li class="zemanta-article-ul-li"><a href="http://blog.amit-agarwal.co.in/2010/04/11/putty-export-client-display-on-login-for-opening-x-application-and-terminal/">PuTTY export client display on login for opening X application and terminal. (amit-agarwal.co.in) <li class="zemanta-article-ul-li"><a href="http://colonelqubit.wordpress.com/2010/05/05/time-to-empty-my-pockets-for-foss-projects/">Time to empty my pockets for FOSS projects (colonelqubit.wordpress.com) <div class="zemanta-pixie"><a class="zemanta-pixie-a" title="Reblog this post [with Zemanta]" href="http://reblog.zemanta.com/zemified/a0e0301f-eb88-41fd-afbb-ab5bea19c81b/"><img class="zemanta-pixie-img" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/reblog_b96.png" alt="Reblog this post [with Zemanta]" /><span class="zem-script more-related more-info pretty-attribution paragraph-reblog">

vim – get the list of all the scripts available.

2010-05-27 1 min read Learning Linux Vim Tips

To get a list of all the scripts in the vim.sf.net project, you can run the following command. This will list all the scripts with the script id.

wget -O – ’http://www.vim.org/scripts/script_search_results.php?&show_me=4000&result_ptr=0’ -o /dev/null | <a class="zem_slink freebase/en/grep" title="Grep" rel="wikipedia" href="http://en.wikipedia.org/wiki/Grep">grep width| grep script_id= |<a class="zem_slink freebase/en/sed" title="Sed" rel="wikipedia" href="http://en.wikipedia.org/wiki/Sed">sed ’s/.*script_id=//’|tr -d ”””|tr ”>” ” ”|sed ’s/< .*//’ | tr -d ’\001’-’\011’’\013’’\014’’\016’-’\037’’\200’-’\377’ |sort -n<h6 class="zemanta-related-title">Related articles by Zemanta <ul class="zemanta-article-ul"> <li class="zemanta-article-ul-li"><a href="http://www.slumpedoverkeyboarddead.com/2009/09/17/use-curl-to-monitor-your-vonage-phone-bill/">Use curl to Monitor Your Vonage Phone Bill (slumpedoverkeyboarddead.com) <li class="zemanta-article-ul-li"><a href="http://securewebs.com/yum-updates/">Yum Updates (securewebs.com) <li class="zemanta-article-ul-li"><a href="http://www.gubatron.com/blog/2009/10/10/ubuntudebian-quick-reference-how-to-change-your-servers-utc-timezone-on-the-command-line/">Ubuntu/Debian Quick Reference: How To Change Your Server’s UTC Timezone on the command line (gubatron.com) <li class="zemanta-article-ul-li"><a href="http://blog.amit-agarwal.co.in/2009/11/22/short-information-about-loaded-kernel-modules/">Short Information about loaded kernel modules (amit-agarwal.co.in) <div class="zemanta-pixie"><a class="zemanta-pixie-a" title="Reblog this post [with Zemanta]" href="http://reblog.zemanta.com/zemified/b22b2e85-8107-4f9b-9130-85a8e8ae370b/"><img class="zemanta-pixie-img" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/reblog_b52.png" alt="Reblog this post [with Zemanta]" /><span class="zem-script more-related more-info pretty-attribution paragraph-reblog">