conjure Command in Linux

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Conjure is a command line utility in Linux that belongs to the ImageMagick suite of tools. This command is used in Linux to interpret and run the scripts written in the Magick Scripting language (MSL).

MSL is primarily designed for users who want to perform custom image processing tasks without the need for programming.

Table of Contents

Here, we’ll discuss the installation process for the conjure command and its usage in Linux.

• How to Install conjure Command?
• How to Use conjure Command in Linux?
• How does the conjure Command Work?

How to Install conjure Command?

The conjure command is not pre-installed in modern Linux distributions. Therefore, you must install it manually using a suitable packager manager like apt, dnf, yum, or Paceman.

Installing conjure Command in Ubuntu

In Debian-based systems, we can install the conjure command from the ImageMagick suite of tools using the following command −

sudo apt install imagemagick -y

Let’s confirm the conjure command installation in the Ubuntu using the following command −

conjure -version

Installing conjure Command in Arch Linux

To install this command on Arch Linux, we must use the Pacman package manager, as follows −

sudo pacman -S imagemagick

Installing conjure Command in CentOS or Fedora

Similarly, we can use the dnf package manager to install the conjure command from ImageMagick on red hat-based distributions −

sudo dnf install ImageMagick

How to Use Conjure Command in Linux?

Let’s understand the basic syntax of the conjure command and its options to learn how it works in Linux −

Basic Syntax of conjure Command

To use the conjure command on Linux, you must follow the given syntax −

conjure [options] script.msl

Here, options represent optional flags or parameters to modify the conjure command.

conjure Command Image Settings and Options

Here are the options available for configuring image generation with the conjure command −

The below table illustrates the the additional options for debugging and obtaining information about the conjure command −

Man Page of conjure Command

For a profound understanding of the conjure command, you can access its manual page, as follows −

man conjure

Help Page of conjure Command

Similarly, you can access the help page of the conjure command to get the details like version number, copyrights, image settings, miscellaneous options, etc., as shown below −

conjure -help

How does the conjure Command Work?

Now let’s learn how the conjure command works in Linux using the following stepwise instructions −

Step 1: Creating a Script File

First, create a script file in an editor like Nano, and give it the extension .msl −

nano exampleScript.msl

Step 2: Writing MSL Commands

Write the code to perform a specific task. For instance, the below-mentioned code creates a PNG image, adds text to it, and saves it −

# Creating an image with a solid green color
canvas 350x350 green

# Adding text to the image
annotate -fill white -gravity center -pointsize 24 "Welcome to tutorialspoint.com"

# Saving the image to a file
write mslImage.png

This will create an image having a solid green background and white text at the center of the image.

Step 3: Executing the Script Using conjure

Now run the conjure command with the file name to execute the MSL script −

conjure exampleScript.msl

Important Consideration − While executing this command, you may encounter an error stating “conjure-im6.q16: no decode delegate for this image format '@error/constitute.c/ReadImage/581”. To avoid this error, make sure the necessary libraries for the specified image format are installed on your system. For example, the following code snippet installs dependencies for the JPEG and PNG formats −

sudo apt install libjpeg-dev
sudo apt install libpng-dev

This way, you can use the conjure command in Linux to run a script written in MSL.

Conclusion

Conjure is a command line utility of the ImageMagick suite of tools. This utility is used for interpreting and running Magick Scripting Language (MSL) scripts. It is not pre-install on most of Linux distributions, however, you can easily install it using a suitable package manager.

In this tutorial, we explored the Conjure command, its basic syntax, options, and practical examples. We covered the installation process on various Linux distributions, including Ubuntu, Arch Linux, and CentOS/Fedora.

We also examined how to access its manual and help pages for further guidance. Finally, we demonstrated the step-by-step process of creating and executing an MSL script with the Conjure command. Finally, we addressed potential errors and their solutions to ensure a smooth execution of MSL scripts.