I will explain how to install libjpeg-dev. Install libjpeg-dev using the apt command. Run with administrator privileges using sudo.
sudo apt install -y libjpeg-dev
What is libjpeg-dev?
(The following description is unconfirmed as of May 14, 2020)
libjpeg-dev is one of the libraries for reading, writing and editing JPEG images.
It is necessary to read "jpeglib.h" in the C language source file.
In Perl, there are modules that use "jpeglib.h" to read and write JPEG images. An example is Imager::File::JPEG, Imager's JPEG image read / write module.
In order to install Imager::File::JPEG, "jpeglib.h" must be installed in the include directory, and the corresponding shared library "libjpeg.so" must be installed in the library directory.
Installing libjpeg-dev installs the "jpeglib.h" header and the corresponding shared library.
On the Web, PNG, GIF, and JPEG images are often uploaded, so install the JPEG library.