How to create custom bash commands?
5 years ago
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Ever since we have used computer, all might have heard of command line tool. Most commonly called bash. Command line is capable of taking input and outputting its results from and to computer. One of the features command line offers is it lets the users to create their own instructions. In this article we will take a tour through the steps on creating our own bash command.

Create custom command on Bash

This feature comes hand full when we are executing 2 or 3 everyday commands to do a single functionality. Let me make the picture more clear. I don't know how many would have created a virtual host. Here I'm considering the virtual host as the scenario. On creating virtual host, include the ip address along with the host name in /etc/hosts/ file. So let's get started.

[Hint: Assuming you are using Linux OS]

For performing with task one must execute the following tasks,

  • Go to /etc folder using
     cd /etc folder. 
  • Now open the hosts file to edit by sudo nano hosts.

So, why we do this all the time, when ever we want to add a newly created host to hosts file.

I have created a custom command for doing this by executing a single command. The steps to create these commands would be a mess, but I bet this is something very useful.

Lets start creating our own command,

  • Open up the terminal, type the command
    sudo nano

    Now a plain space must appear in your terminal.

  • Now enter the following
        #command to open /etc/hosts file
        sudo nano /etc/hosts

    Let me explain, The symbol you see is often referred as 'HashBang' which points to /bin/bash which means the command we've entered in this case sudo nano /etc/hosts runs using bash program. Second line is the comment for the instruction for later reference. Third line refers to the set of instructions to execute. .

  • Save the file with the name of your costum command you intend to make. Lets name it as 'ghost' in short of go to hosts file.
  • Now If you try to execute the command we have created, let's say ghost, you can notice that the 'command not found'.
  • As a next step, move the file to /usr/bin
    cp -i ghost /usr/bin

    Here we are copying ghost to /usr/bin folder

  • Now try to type ghost on bash, you we see 'permission denied' error.
  • From above we must get a clue, that the file we created is not executable. So lets move to give the file executing permission
    chmod +x ghost
  • Now make a run to execute your command on terminal. It must open up the hosts file in etc folder.

Bash is providing a universe of pre defined commands. Lets make it our own by putting some effort in customizing. By this way, we can create our own commands for everyday combination of commands we use in one step. Bash can do tasks faster than Graphical Interface. It also allow access to more commands and scripts.



on 01st January 2008 / by webmaster
We have added a few new modules to our site recently. Drupal Technical StumbleThis Leave a reply Your email address will not be published. Required fields are marked * Sean (not verified) access_time 25 May 2020 - 06:59 Hi there, I uploaded the files, enabled the modules to use SU, and now I see the link, but there is no icon... How can I fix this? Thanks, Sean webmaster access_time 25 May 2020 - 06:59 In reply to Icon doesn't show by Sean (not verified) What do you see when you view the source? Search for stumblethis_button and you should be able to see the code for the image and the URL. Then you should be able to troubleshoot from there. Juicy Couture Addict (not verified) access_time 25 May 2020 - 06:59 thanks for the post. would love to hear more of you. by the way, drupal's really popular nowadays as it has easy and fast features. you agree with me? thanks. Add new comment

on 16th January 2008 / by webmaster
Most webmasters do not realize this, but a lot of the content on lot of websites can be accessed from multiple URLs. A simple example would be where and leads to the same page. This is a fatal mistake in Search Engine Optimization and search engines penalize you for duplicate content. The correct configuration would be where the above two urls will lead you to the same page but will redirect you to with a 301 (Moved permanently) status which will not result in search engines penalizing the page. It is very easy to configure 301 redirects using Apache .htaccess file and the process is the same for a Drupal installation also. Drupal Technical Apache htaccess SEO Leave a reply Your email address will not be published. Required fields are marked * Anonymous (not verified) access_time 25 May 2020 - 06:59 Hello. I'm trying to make show as, and I'm running into difficulties. I'm on Apache 2.0 and using the following lines in my httpd.conf file: RewriteEngine on RewriteCond %{HTTP_HOST} ^xxxxxxxxxx\.com$ [NC] RewriteRule ^(.*)$$1 [L,R=301] When I go to, I get (as expected). However, when I go to (it's a Drupal site), I get a 404 thrown and the URL changes to Same thing with Any suggestions? I want to run without Drupal's .htaccess file (instead incorporating these calls into my httpd.conf file). webmaster access_time 25 May 2020 - 06:59 In reply to Rewrite including filesystem path by Anonymous (not verified) I think the problem is with the base path which results in the redirection to /var/www/ part. The best approach I would think is to start with drupal htaccess and then strip out parts and move to httpd SNVC (not verified) access_time 25 May 2020 - 06:59 This is definitely a good guide. Thanks for this. wellyson access_time 25 May 2020 - 06:59 This is really nice and helpful. Add new comment

on 08th February 2008 / by webmaster
Attachment Size slashdotit.tar.gz 173.55 KB Similar to the StumbleThis module that we had created earlier we have created another bookmarking Drupal Technical Slashdotit Leave a reply Your email address will not be published. Required fields are marked * Shlomi Fish (not verified) access_time 25 May 2020 - 06:59 Hi! I'm interested in this module, but Drupal 6.2 complains that it's incompatible with it. Can you please update it or tell me how? Regards, Shlomi Fish webmaster access_time 25 May 2020 - 06:59 In reply to Can you update it for Drupal-6.x? by Shlomi Fish (not verified) Sure we are working on this currently and will post an update soon. Also we will post this module on as well Cheers Anoop John Team Zyxware Anonymous (not verified) access_time 25 May 2020 - 06:59 Hello! Nice Article very interesting, thanks Add new comment
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