A description of using pipes with ssh in a way that allows the results of mysqldump on a remote machine to be stored locally without creating a temporary file.
It happens countless times for many reasons. You attempt to start or restart your MySQL server after a small configuration change and MySQL stubbornly refuses to start.
LVM allows volumes to be dynamically resized online—no rebooting is required. This presumes, of course, that LVM is set up initially when the virtual host is created.
I was working on a server this morning and accidentally deleted an important configuration file. Like many Linux users, I lamented the absence of an “undelete” command.