OTRS on Ubuntu

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First get the source code from official website, and untar it via:

$ sudo tar xjvf otrs-3.3.8.tar.bz2 -C /opt/
$ cd /opt
$ sudo mv otrs-3.3.8/ otrs

Check the modules :

$ /opt/otrs/bin/otrs.CheckModules.pl

Install following packages:

$ sudo apt-get install liblwp-useragent-determined-perl libapache2-mod-perl2 libnet-dns-perl libnet-smtp-ssl-perl libnet-smtp-tls-butmaintained-perl libyaml-perl
$ sudo apt-get install libgd-text-perl libjson-xs-perl libpdf-api2-perl libtext-csv-xs-perl libxml-parser-perl

Add corresponding users and group:

$ sudo useradd -d /opt/otrs/ -c 'OTRS user' otrs
$ sudo usermod -G www-data otrs

Create the OTRS Config Files:

$ pwd
/opt/otrs
$ sudo cp Kernel/Config.pm.dist Kernel/Config.pm
$ sudo cp Kernel/Config/GenericAgent.pm.dist Kernel/Config/GenericAgent.pm

Check dependencies via:

$ perl -cw /opt/otrs/bin/cgi-bin/index.pl
/opt/otrs/bin/cgi-bin/index.pl syntax OK
$ perl -cw /opt/otrs/bin/cgi-bin/customer.pl
/opt/otrs/bin/cgi-bin/customer.pl syntax OK
$ perl -cw /opt/otrs/bin/otrs.PostMaster.pl
/opt/otrs/bin/otrs.PostMaster.pl syntax OK

Set permission:

$ sudo bin/otrs.SetPermissions.pl --otrs-user=otrs --web-user=www-data --otrs-group=www-data --web-group=www-data /opt/otrs

Now Set the conf file for apache2:

$ sudo cp /opt/otrs/scripts/apache2-httpd.include.conf /etc/apache2/sites-available/otrs
$ sudo ln -s /etc/apache2/sites-available/otrs.conf  /etc/apache2/sites-enabled/otrs
$ sudo a2ensite otrs
$ sudo service apache2 restart

Now go to following URL for installation:
http://joggler.xxx.xxx..com/otrs/installer.pl

After installation, restart mysql and httpd, or you will meet OTRS - Access denied for user otrs@localhost

Add crontab tasks via following commands:

# su otrs
$ cd /opt/otrs/var/cron
$ pwd
/opt/otrs/var/cron
$ for foo in *.dist; do cp $foo `basename $foo .dist`; done
$ /opt/otrs/bin/Cron.sh start
/opt/otrs/var/cron
Cron.sh - start/stop OTRS cronjobs
Copyright (C) 2001-2012 OTRS AG, http://otrs.org/
(using /opt/otrs) done
$ crontab -l

Now everything goes OK, visit joggler.xxx.xxx..com/otrs/customer.pl for visit the customer panel.

Change the password for root@localhost:

# ./otrs.SetPassword.pl root@localhost PLATFORM
Set password for user 'root@localhost'.
Done.