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Many people use SSH to log in to remote machines, copy files around, and perform general system administration. If you want to increase your productivity with SSH, you can try a tool that lets you run commands on more than one remote machine at the same time.
Linux has all kinds of great networking abilities built-in; Carla Schroder shares some tips and tricks for navigating multiple computers at home or in an office, and keeping your files where they belong.
A remote or online backup service has become quite an important tool for those of us who travel a lot and require some of our files on the cloud for easy access anytime and any place with Internet connection. I have here a list of some of the best online or remote backup services for Linux.
The ability to run both console and graphical programs securely on a remote system using SSH brings you a great deal of freedom. When the communications link to that remote system has high latency, however, running interactive programs such as a text editor on the remote machine can become a real test of your patience.
Over the years I've come across some useful tricks in PHP that are not obvious, but are worth mentioning. This is not meant to be a comprehensive list of all the useful tricks that you can do with PHP.