Rsync is a very powerful backup tool. It can significantly speed up backup process and minimize amount of data transferred during synchronization. In most cases rsync is used to make incremental backups, but it also has another interesting option which gives you ability to keeping old versions of files on backup server. Mentioned option is ‘–backup’ or simply ‘-b’. Continue Reading
Some kinds of software require only one format of SSL certificates. This is the way how you can convert certificates between two popular formats (PEM and DER).
openssl x509 -inform DER -in der-cert.crt -outform PEM -out pem-cert.pem
And vice versa:
openssl x509 -inform PEM -in pem-cert.pem -outform DER -out der-cert.crt
Last time I’ve experienced uncommon problem with one of my hard drives. Due a power failure of my NAS server a hard drive could’t spin up.
Let’s consider web server and popular blog software installed on it (WordPress). WordPress uses MySQL database to store blog’s data. Have you ever tried visit your website and hold Ctrl + Shift + R keys?