Tweet Make a backup of the old key and certificate file mv /etc/ssl/certs/dovecot.pem /etc/ssl/certs/dovecot.pem.old mv /etc/ssl/private/dovecot.key /etc/ssl/private/dovecot.key.old Create the new SSL certificate openssl genrsa -out /etc/ssl/private/dovecot.key 1024 openssl req -new -x509 -key /etc/ssl/private/dovecot.key -out /etc/ssl/certs/dovecot.pem -days 730 Restart Dovecot: /etc/init.d/dovecot
Tweet The following tutorial describes the steps to optimize the performance of a MySQL database with the mysqltuner script. Login to your server on the shell, then execute the following commands: Download the MySQL tuner script: cd /usr/local/bin wget http://mysqltuner.pl/mysqltuner.pl
Tweet To create new SSL certificates for the dovecot pop3 and imap server on Ubuntu, follow these steps: Make a backup copy of the old key and certificate file sudo cp /etc/ssl/private/dovecot.key /etc/ssl/private/dovecot.key.old sudo cp /etc/ssl/certs/dovecot.pem /etc/ssl/certs/dovecot.pem.old Create the new
Tweet Postfix provides with postsuper, postqueue and mailq some shell utilitys to manage the mailqueue. Here are some examples for common tasks: List all messages that are in the mailqueue postqueue -p The output looks like this: [email protected]:/# postqueue -p
Tweet Want to zoom your MAC screen easy, fast and steplessly? You only have to keep the CTRL key pressed and use the Mousewheel to zoom in and out. On new MacBooks you can also use the touchpad with two!
Tweet Sometimes you need to know to which debian or ubuntu package a specific file belongs, e.g. because you deleted a system file and want to reinstall it. There is a handy utility called apt-file which searches for a filename
Tweet The easiest way to make screenshots is to use Take Screenshot. You find it under Applications/Accessoires. First change the delaytime for the screenshot from 0 to 1 or 2 seconds. This is the time you have to mark the
Tweet KRITA is a free image editing tool that ist pretty versatile and helps you not only to edit images, but also to use it for more artistic work on e.g. tablet PCs. It will surely remind you of Photoshop.
Tweet If you always wanted the Exposé effect on your Ubuntu Desktop, here you go! Active corners, known from Mac as Exposé, allow you e.g. to see all your open windows at once just by one mouse move into the
Tweet By default it is not possible to connect to webdav resources without SSL encryption in Windows 7. To enable unencrypted connections (http and not just https), follow these steps: Press the keys [Windows] + [R] to open the windows