bash – echo command with option to display the output on the same line.

Here is a nice little trick to display the output in the same line :

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    <div class="bash codecolorer">
      &nbsp;<span class="kw3">echo</span> <span class="re5">-ne</span> <span class="st0">"output\<span class="es1">\r</span>"</span>
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The trick here is simple, first we disable the <a class="zem_slink" title="Newline" rel="wikipedia" href="http://en.wikipedia.org/wiki/Newline">newline printed by <a class="zem_slink" title="Echo (command)" rel="wikipedia" href="http://en.wikipedia.org/wiki/Echo_%28command%29">echo command with the &#8221;-n&#8221; option and then we enable the interpretation of the <a class="zem_slink" title="Backslash" rel="wikipedia" href="http://en.wikipedia.org/wiki/Backslash">backslash characters with the &#8221;-e&#8221; option. As the &#8221;\r&#8221; is used as <a class="zem_slink" title="Carriage return" rel="wikipedia" href="http://en.wikipedia.org/wiki/Carriage_return">carriage return which brings you to the start of the line without the newline (like in <a class="zem_slink" title="Typewriter" rel="wikipedia" href="http://en.wikipedia.org/wiki/Typewriter">typewriter), we will use the same to get the desired effect. So, if you wanted a stopwatch for a 100 seconds on the console then this simple bash <a class="zem_slink" title="For loop" rel="wikipedia" href="http://en.wikipedia.org/wiki/For_loop">for loop would do the same:

Fedora Linux – Display information about users currently logged on – whowatch

Here is description of program/utility to display the currently logged in user in a Linux box (tried on Fedora 13 Goddard):

Whowatch is an interactive console utility that displays informations about the users currently logged on to the machine, in real time. Besides standard information (login, tty, host, user&#8217;s process) you can see type of login (ie. ssh, telnet). You can also see selected user&#8217;s processes tree or all system processes tree.  In the process tree mode there is ability to send INT or KILL signal to selected process.

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Remove some path from the PATH variable temporarily.

How many times has it happened to you that you are working on some linux platform (like Fedora/Ubuntu/CentOS etc) and suddenly you see that you need to remove some path from the PATH variable so that a script is executed from some other path. It really difficult to do this if the path is too long and if you end up doing this couple of times. If that is the case, then the below script is for you 🙂

Use the last command\’s output as input to a command without piping and bind to it to a key sequence in bash.

Use the last command&#8217;s output as input to a command without piping and
bind to it to a key sequence in <a class="zem_slink" title="Bash (Unix shell)" rel="homepage" href="http://tiswww.case.edu/php/chet/bash/bashtop.html">bash.

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    <div class="bash codecolorer">
      &nbsp;<span class="kw3">bind</span> <span class="co3">\'</span><span class="st0">"\\C-h"</span>: <span class="st0">"\\<span class="es5">`fc\\ \\-s\\`</span>"</span><span class="co3">\'</span>
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My comment : fc is the fix command of the bash builtin.
This is similar to using `!!` or

tee to a file descriptor

tee to a file descriptor

1

$ tee >(cat – >&2)

the tee command does fine with file names, but not so much with file descriptors, such as &2. This uses process redirection to tee to the specified descriptor.

In the sample output, it’s being used to tee to stderr, which is connected with the terminal, and to wc -l, which is also outputting to the terminal. The result is the output of bash –version followed by the linecount

How To Install Ailurus 10.05 On Fedora | HowtoForge - Linux Howtos and Tutorials

For those of you who don&#8217;t know about ailurus:

Ailurus is cross-<a class="zem_slink" title="Linux distribution" rel="wikipedia" href="http://en.wikipedia.org/wiki/Linux_distribution">Linux-distribution <a class="zem_slink" title="GNU General Public License" rel="wikipedia" href="http://en.wikipedia.org/wiki/GNU_General_Public_License">GPL <a class="zem_slink" title="Computer software" rel="wikipedia" href="http://en.wikipedia.org/wiki/Computer_software">software, which aims at making Linux easier to use, for newcomers.

And the features include:

Ailurus can …

• display Linux skills
• install popular software
• change <a class="zem_slink" title="GNOME" rel="homepage" href="http://www.gnome.org/">GNOME settings
• display <a class="zem_slink" title="Hardware" rel="wikipedia" href="http://en.wikipedia.org/wiki/Hardware">hardware information
• enable some third party repositories#
• clean apt/yum cache#
• backup and recover apt/yum status#

the features marked with &#8221;#&#8221; support Ubuntu/Fedora only

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Linux command to repeat a string n times - Super User

I was working on something and needed to output the string n times. I have required this even to print a line with &#8217;-&#8217; or &#8217;=&#8217; but this time I badly wanted it in bash. So I searched google and found this:

printf &#8221;Amit Agarwal%.0s&#8221; {1..5}

Explanations and other examples: <a href="http://superuser.com/questions/86340/linux-command-to-repeat-a-string-n-times">http://superuser.com/questions/86340/linux-command-to-repeat-a-string-n-times<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.rateitall.com/i-3177235-flat-rate-us-terminations.aspx">1 reviews of Flat-Rate US Terminations (rateitall.com) <li class="zemanta-article-ul-li"><a href="http://www.brighthub.com/computing/linux/articles/75743.aspx">Top Linux GUI (brighthub.com) <li class="zemanta-article-ul-li"><a href="http://www.gnu.org/software/emacs/tour/">A guided tour of Emacs (gnu.org) <div class="zemanta-pixie" style="margin-top: 10px; height: 15px;"><a class="zemanta-pixie-a" title="Enhanced by Zemanta" href="http://www.zemanta.com/"><img class="zemanta-pixie-img" style="border: medium none; float: right;" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/zemified_e6.png" alt="Enhanced by Zemanta" /><span class="zem-script more-related pretty-attribution">