Pimp your ls

Here are some of the things that you can do with your ls command.

First off you can use alias’s to help you type the most typical ls commands. I will give you some examples:

alias ls =”ls –color –classify”
alias ls.=”ls -d .*”

Very commonly used :

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      alias ll="ls -lhvrt"<br /> lsd="ls -lUd */" # List directories only
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1 2

And after all this you can download the l script from pixelbeat. Quite interesting:

more powerful grep – ack

For last couple of days, I have been using ack instead of grep. Here is description of ack:

Ack is designed as a replacement for grep.

There are couple of reasons I am using ack. First and foremost being it does not require a filename. So, for seaching amit in all files recursively under the current directory I can simply use

ack amit

More reasons to use ack:

It supports pager option and there can be a rc file that can be used to define the default options that needs to be used with ack. Here is the contents of my $HOME/.ackrc file.

mussh - Multihost SSH wrapper

Description:

Mussh is a <a class="zem_slink freebase/en/shell_script" title="Shell script" rel="wikipedia" href="http://en.wikipedia.org/wiki/Shell_script">shell script that allows you to execute a command or script over ssh on multiple hosts with one command. When possible mussh will use <a class="zem_slink freebase/en/ssh-agent" title="Ssh-agent" rel="wikipedia" href="http://en.wikipedia.org/wiki/Ssh-agent">ssh-agent and RSA/DSA keys to minimize the need to enter your password more than once.

It is a utility for <a class="zem_slink freebase/en/system_administrator" title="System administrator" rel="wikipedia" href="http://en.wikipedia.org/wiki/System_administrator">system administrators maintaining more than one hosts. The utility will help the admin to execute the same command on multiple hosts with a single command.

Menu driven ssh.

I have quite a lot of servers where I need to ssh at workplace and I generally don&#8217;t remember all of them, so I wrote a simple yet useful script. In all the servers I have already copied my key so I dont need a password to login. Without much ado, here is the script.

echo &#8221;Enter the server name:&#8221;
echo &#8221;1. redhat&#8221;
echo &#8221;2. fedora&#8221;

read server

if [ &#8221;$server&#8221; = &#8221;1&#8221; ]; then
ssh amit@redhat
else if [ &#8221;$server&#8221; = &#8221;2&#8221; ]; then
ssh amit@fedora
else
echo &#8221;Not a valid choice&#8221;
fi
fi

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Display the history and optionally grep

Ever wondered how good it would be to have a command/function that would display the history or display the history with <a class="zem_slink" title="Grep" rel="wikipedia" href="http://en.wikipedia.org/wiki/Grep">grep.

Would be really good right, well someone thought about this 🙂

$ h() { if [ -z &#8221;$1&#8221; ]; then history; else history | grep &#8221;$@&#8221;; fi; }

Place this in your .bash_profile and you can use it two different ways. If you issue &#8217;h&#8217; on its own, then it acts like the history command. If you issue:

Awk Introduction Tutorial – 7 Awk Print Examples

awk examples

Awk Introduction Tutorial – 7 Awk Print Examples This is the first article on the new awk tutorial series. We’ll be posting several articles on awk in the upcoming weeks that will cover all features of awk with practical examples. In this article, let us review the fundamental awk working methodology along with 7 practical awk print examples. Note: Make sure you review our earlier […]

Mirror or download a website with a tool much better than wget

If you want to mirror a <a class="zem_slink freebase/en/website" title="Website" rel="wikipedia" href="http://en.wikipedia.org/wiki/Website">website, the simplest tool I know if is <a class="zem_slink freebase/en/wget" title="Wget" rel="homepage" href="http://www.gnu.org/software/wget/">wget. Once you have used wget, you know the troubles associated with it. You also get added couple of files as search html files, which are useless and wastage of bandwidth for you as well as the <a class="zem_slink freebase/en/web_server" title="Web server" rel="wikipedia" href="http://en.wikipedia.org/wiki/Web_server">webserver.

lftp -e &#8221;mirror -c&#8221; 

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