memcached is a general-purpose distributed memory caching system
originally developed by Danga Interactive for LiveJournal but now used
by many other sites. It is often used to speed up dynamic
database-driven websites by caching data and objects in RAM to reduce
the number of times an external data source (such as a database or API)
must be read. Here we describe the options available from the command
line to control a memcached instance via unix socket or IP:port.
My book Create Simple GUI Applications with Python & Qt5 has been updated! New chapters on the Model View architecture and custom widgets.
A quick one-liner to recursively search files for a given text string.
Sometimes things go a bit wrong. Sometimes they go very wrong. XKill is a simple little application that allows you to kill a running X application that has got out of kilter. Think of this as a quick way to get back control of your Desktop.
On desktop setups where icons are shown on the desktop these are normally taken from the specific folder ~/Desktop. If you find you want to show icons from either your Home or another directory for a particular install/user you can do so by editing the user-dirs config file as described here.
Screen is a neat little program that allows you to use multiple virtual terminals in a single session on Unix/Linux and Mac. However, it does more than just that. It can also allow you to share your current session on a machine with another user - allowing you to collaboratively hack away at a problem in real time.
Install the latest version of Google Earth for linux direct from Google sources.
Bash command substitution performs a given command replacing the marker with the resulting standard output. It is particularly useful when you want to store the output of a command in a variable or as an alternative method of chaining multiple commands together.
System request (often abbreviated SysRq or Sys Req) is a key on keyboards for PCs that has no standard use. This key can be traced back to the operator interrupt key of the IBM System/370 mainframe computer. But under Linux there's a bunch of useful things available via this key.
Brace expansion is one of the most powerful bash tricks with the potential to save you considerable time. Here are some common use cases.
Find the currently running processes on your system that were not started by yourself. A great way to find out what is hogging your system on multiple-user setups or remote logins.
Often forgotten the
file command will give you a simple summary of a file's type and content.
Cinnamon is a re-implementation of the Gnome 2 desktop in GTK3 developed by the Linux Mint project as an alternative to both Gnome3/Shell and Ubuntu Unity. Here we explain how to install Cinnamon on top of your Ubuntu installation, without installing Linux Mint.
Update your session to new settings in .bash_profile without logging out and back in again.
Create your own bash pipes to send program output between shells, processes and users.
Re-run previously entered command as root user.
Debug Gnome Shell, or run it from the console, either for plugin development or troubleshooting.
Bash history expansion allows you to quickly re-run previous commands using ! and the number of the command in your history.
Interactively search through your command line history with a simple keyboard shortcut.
GNU Screen is a command-line application that allows use of multiple virtual sessions within a single real terminal or remote session. Importantly, it allows for persistent running of command-line applications independent of the shell that initiated them program, meaning active applications can persist during disconnection.
While getting started using the new wp-plugins.org SVN I was looking for a quick way to download the contents of an SVN to local disk. This can be useful when doing research on methods employed by other plugins or for getting a local development copy where SVN access is unavailable. Under KDE you can normally access any remote location using the standard URL format. For example, an SVN (using the
svn://) protocol would normally be accessed using the URL style
Increasing traffic is the measure of success for a website. More visitors equals more exposure which in turns generates more income. However, if you have hosted your site on a low-end package you could get hit by excess use charges just as your start celebrating your success.