Answers for "linux php 7.2 how to install gd2 library"

install gd extension php ubuntu

#install gd extension, 7.4 replace it with your version
sudo apt-get install php7.4-gd
#check if installed
php -m | grep gd
#restart your web server 
sudo service apache2 restart
or
sudo service nginx restart

sudo apt-get install php7.0-gd

#check php verison first using:

$php -v

#It will give version number suppose your version is 7.0.1 then use this command to install GD Library

$sudo yum install php70-gd

#OR use this command depending upon server specification

$sudo apt-get install php7.0-gd