colors in bash -- script to display all the possible colors.

If you wanted to have colors in the bash output (including the colors in PS1-4), don’t you keep wondering how the color code would look on the terminal. So, I wrote this small script to show the complete color codes. This is how the output would look:

And here is the script:

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      #!/bin/bash -<br /> #===============================================================================<br /> #<br /> # &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;FILE: &nbsp;colors.sh<br /> #<br /> # &nbsp; &nbsp; &nbsp; &nbsp; USAGE: &nbsp;./colors.sh<br /> #<br /> # &nbsp; DESCRIPTION: &nbsp;Bash colors<br /> #<br /> # &nbsp; &nbsp; &nbsp; OPTIONS: &nbsp;---<br /> # &nbsp;REQUIREMENTS: &nbsp;---<br /> # &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;BUGS: &nbsp;---<br /> # &nbsp; &nbsp; &nbsp; &nbsp; NOTES: &nbsp;---<br /> # &nbsp; &nbsp; &nbsp; &nbsp;AUTHOR: &nbsp;Amit Agarwal (AKA), amit.agarwal@amit-agarwal.co.in<br /> # &nbsp; &nbsp; &nbsp; COMPANY: &nbsp;Individual<br /> # &nbsp; &nbsp; &nbsp; VERSION: &nbsp;1.0<br /> # &nbsp; &nbsp; &nbsp; CREATED: &nbsp;09/21/2009 06:12:07 PM IST<br /> # &nbsp; &nbsp; &nbsp;REVISION: &nbsp;---<br /> #===============================================================================<br /> <br /> for c in `seq 0 255`;<br /> do<br /> t=5;<br /> [[ $c -lt 108 ]]&&t=0;<br /> for i in `seq $t 5`;<br /> do<br /> #Display the codes also for easier lookup in terminal<br /> <!--loginview start-->echo $i;${c}<!--loginview end--><br /> echo -e "<a class="zem_slink" title="Path (computing)" rel="wikipedia" href="http://en.wikipedia.org/wiki/Path_%28computing%29">\\</a>\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d \'[0-9]\'`\\e[0m";<br /> done;<br /> done<br /> <br /> # setup_colors - Adds colors to array CC for global use<br /> # 30 - Black, 31 - Red, 32 - Green, 33 - Yellow, 34 - Blue,<br /> # 35 - Magenta, 36 - Blue/Green, 37 - White,<br /> # 30/42 - Black on Green \'30\\;42\'<br /> <!--loginview start-->function setup_colors(){<br /> declare -a CC;<br /> for i in `seq 0 7`;<br /> do<br /> ii=$(($i+7));<br /> CC[$i]="\\033[1;3${i}m";<br /> CC[$ii]="\\033[0;3${i}m";<br /> done;<br /> CC[15]="\\033[30;42m";<br /> R=$\'\\033[0;00m\';<br /> X=$\'\\033[1;37m\';<br /> export R X;<br /> }<br /> function display_colors(){<br /> for i in $(seq 0 $((${#CC[@]} - 1))); do echo -e "${CC[$i]}[$i]\\n$R"; done<br /> }
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PuTTY ssh without password

you can do a ssh without password.. Today we will see how to do this with putty.

Generate public/private (DSA)key pair using puttygen.
copy the public key to ~/.ssh/authourized_keys on your server (moonware/sunware/skyware). Same key can be used on all the servers.
make sure that your home directory permissions are 755
directory permission for .ssh is 700
file permission for authourized_keys is 600
now login using putty and specify your private key in the configuration of putty and also specify your username.

save date and time for each command in history

<a href="http://blog.amit-agarwal.co.in/category/linux/">Bookmark this category

Security — Installing and monitoring snort logs.

Snort is a very good security tool to install if you are concerned about the security of your system. I find it really useful but the problem is I keep forgetting to monitor the logs so what did I do, I installed snort and configured cron to send to logs everyday, here&#8217;s how.

On fedora, snort is available in the repository but the rules are not. So to install snort just type in the following in a terminal:

SQuirrel SQL for Graphical interface to Oracle/MySQL and loads of other database -- OSS and free.

<a href="http://blog.amit-agarwal.co.in/category/linux/">Bookmark this category

SQuirrel <a class="zem_slink freebase/en/sql" title="SQL" rel="wikipedia" href="http://en.wikipedia.org/wiki/SQL">SQL for <a class="zem_slink freebase/en/graphical_user_interface" title="Graphical user interface" rel="wikipedia" href="http://en.wikipedia.org/wiki/Graphical_user_interface">Graphical interface to Oracle/MySQL and loads of other <a class="zem_slink freebase/en/database" title="Database" rel="wikipedia" href="http://en.wikipedia.org/wiki/Database">database — <a class="zem_slink freebase/en/open_sound_system" title="Open Sound System" rel="homepage" href="http://www.opensound.com/">OSS and free.

<a class="zem_slink freebase/en/squirrel_sql_client" title="SQuirreL SQL Client" rel="homepage" href="http://www.squirrelsql.org/">SQuirreL SQL Client is a graphical SQL client written in <a class="zem_slink freebase/guid/9202a8c04000641f800000000f8545aa" title="Java (programming language)" rel="homepage" href="http://java.sun.com">Java that will allow you to view the structure of a <a class="zem_slink freebase/en/java_database_connectivity" title="Java Database Connectivity" rel="wikipedia" href="http://en.wikipedia.org/wiki/Java_Database_Connectivity">JDBC compliant database, browse the <a class="zem_slink freebase/en/data" title="Data" rel="wikipedia" href="http://en.wikipedia.org/wiki/Data">data in tables, issue SQL commands etc. The pre-requisites are java 1.5 and 1.6 in the sequence of the <a class="zem_slink freebase/en/installation" title="Installation (computer programs)" rel="wikipedia" href="http://en.wikipedia.org/wiki/Installation_%28computer_programs%29">installer versions! Installers available at: <a href="http://sourceforge.net/projects/squirrel-sql/files/">http://sourceforge.net/projects/squirrel-sql/files/ Home page and installation instructions at: <a href="http://www.squirrelsql.org/#installation">http://www.squirrelsql.org/#installation Have a nice time with the SQuirreL!!<h6 class="zemanta-related-title">Related articles by Zemanta <ul class="zemanta-article-ul"> <li class="zemanta-article-ul-li"><a href="http://blog.amit-agarwal.co.in/2010/04/27/fvwm-look-and-feel-icons-and-themes/">fvwm Look and Feel, icons and themes (amit-agarwal.co.in) <li class="zemanta-article-ul-li"><a href="http://checkedexception.blogspot.com/2010/03/using-ms-sql-from-linux.html">Using MS SQL from Linux (checkedexception.blogspot.com) <li class="zemanta-article-ul-li"><a href="http://briancarper.net/blog/adminer-where-have-you-been-all-my-life">Adminer, where have you been all my life? (briancarper.net) <li class="zemanta-article-ul-li"><a href="http://helpdeskgeek.com/databases/an-introduction-to-oracle-sql-developer-part-v/">An Introduction to Oracle SQL Developer – Part V (helpdeskgeek.com) <div class="zemanta-pixie"><a class="zemanta-pixie-a" title="Reblog this post [with Zemanta]" href="http://reblog.zemanta.com/zemified/6c1be63c-1479-4ac2-9707-3e8c8b750585/"><img class="zemanta-pixie-img" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/reblog_b12.png" alt="Reblog this post [with Zemanta]" /><span class="zem-script more-related more-info pretty-attribution paragraph-reblog">