How to install Typo3 cms version 9.1 On Linux Mint-18.3

Now navigate to the downloaded directory and extract the downloaded package as follows.

linuxhelp ~ # cd /home/user/
linuxhelp user # cd Downloads/
linuxhelp Downloads # ls
typo3_src-9.1.0.tar.gz

linuxhelp Downloads # tar -zxvf typo3_src-9.1.0.tar.gz 
typo3_src-9.1.0/
typo3_src-9.1.0/_.htaccess
typo3_src-9.1.0/_web.config
typo3_src-9.1.0/composer.json
typo3_src-9.1.0/composer.lock
typo3_src-9.1.0/CONTRIBUTING.md
typo3_src-9.1.0/index.php
typo3_src-9.1.0/INSTALL.md
typo3_src-9.1.0/typo3/sysext/
.
.
.
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/OrViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/RenderViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/SectionViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/SpacelessViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/SwitchViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/ThenViewHelper.php
typo3_src-9.1.0/vendor/typo3fluid/fluid/src/ViewHelpers/VariableViewHelper.php

After extracting rename the directory as follows.

linuxhelp Downloads # ls
typo3_src-9.1.0  typo3_src-9.1.0.tar.gz
linuxhelp Downloads # mv typo3_src-9.1.0 typo3

we have to move the typo3 directory into the /var/www directory:

linuxhelp Downloads # mv typo3 /var/www/

Next, you need to change ownership and permission of the Directory.

linuxhelp Downloads # cd /var/www/
linuxhelp www # ls
html  typo3
linuxhelp www # chown -R www-data:www-data typo3/

Now create an empty named as first_install.

linuxhelp www # cd typo3/
linuxhelp typo3 # ls
composer.json  CONTRIBUTING.md  index.php   LICENSE.txt  typo3   _web.config
composer.lock  _.htaccess       INSTALL.md  README.md    vendor
linuxhelp typo3 # mv _.htaccess .htaccess
linuxhelp typo3 # touch /var/www/typo3/FIRST_INSTALL

Now we have to edit the php.ini configuration file, so open the php.ini file and configure them as follows.

linuxhelp www #vim /etc/php/7.2/apache2/php.ini
memory_limit = 256M
upload_max_filesize = 64M
post_max_size = 64M
max_input_vars = 1500
max_execution_time = 240

Next, we have to configure a virtual host for typo3 CMS so navigate to the site available location and create an empty file named as typo3.conf.

linuxhelp typo3 # cd /etc/apache2/sites-available/
linuxhelp sites-available # vim typo3.conf

Add the following lines to the configuration file.

< VirtualHost *:80> 
ServerName www.linuxhelp1.com
DocumentRoot /var/www/typo3/
< Directory /var/www/typo3/> 
AllowOverride All
allow from all
< /Directory>  
< /VirtualHost>  

Enable the typo3.conf as follows.

linuxhelp sites-available # a2ensite typo3.conf
Enabling site typo3.
To activate the new configuration, you need to run:
service apache2 reload

Restart the Apache web server.

linuxhelp sites-available # systemctl restart apache2.service

Make an entry in host file as follows.

linuxhelp sites-available # vim /etc/hosts
<  give your ip address>     < give your domain name> 

Again restart apache web server.

linuxhelp sites-available # systemctl restart apache2.service

Now you can proceed the further installation and configuration from the browser by navigating to the following URL: http://< ipaddress or domain name.

After Verifying the System environment check proceed further.

Now configure the database setup and configure as follows.

Select the database and proceed.

And then configure the admin credentials setup and click continue.

After the installation, you will see the following page and then click on open the " typo3 backend."

As you can see here the login page appears and log in using the admin user credentials.