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Archive for the ‘Linux’ Category

KDE Versus GNOME

K Desktop Environment GNOME

What follows is a succinct comparison between dominant desktop environments/window managers for Linux. It is based on personal experience with KDE (under SuSE and Fedora) and
GNOME (under Ubuntu and RedHat).

KDE GNOME
Heavy Light
Highly-customisable Relatively standardised
Well-integrated Depleted
Resource-demanding Somewhat minimal

Virtual Desktops in 3-D

The Linux enhancement under question is based on OpenGL. It revolves different virtual desktops (if you use a pager) to achieve the illusion that they hover around in space. This looks great, but it is not necessarily practical. See the 3-D Desktop project homepage.

3-D Desktop

Palm Headed for Linux

PenguinsThroughout the past few months, as Palm users began to migrate elsewhere, there have been talks about embracing the open-source community (i.e. Linux) and placing special emphasis on inter-operability. Many Mac users, in fact, have chosen Palm, their reasons being obvious. When one gets to think about this trend, Apple followed a similar path when Mac OS X was introduced. An alliance, in some sense, appears to be the best way to tackle giants and benefit from each other’s strengths. As an example, the wonderful design of the Macs, in particular their user interface, made Jaguar one of the most appealing and the most reliable ‘Linux distributions’. Also it made it commonplace in the market of laptops.

Let us hope that likewise, we may soon see Linux in our pockets and our schedules under Linux — something which was miserably lacked despite Linux-Palm projects like KPilot.

CNET have have just reported that Palm pursue this possibility further:

PalmSource moved a little closer to the open-source community this week.

The maker of the Palm OS has joined the Consumer Electronics Linux Forum, or CELF, pushing ahead with its plans for a version of the Palm OS that runs on top of Linux.

Cited by: PalmAddict

Poor User Interfaces

Open-source advocates must have come across odd GUI‘s where formality is neglected. An example is presented below (from GIMP 1.2.3, edited using the GIMP):

GIMP GUI Screen-shot

Firstly, have a look at the window title. Is the exclamation mark necessary? Secondly, look at the poor layout of the buttons. Thirdly, is the message at the bottom helpful? It does not make the application look professional. Is it inexcusable that open-source programmers cannot deploy their products in the commercial world?

Cron-based Backup

Servers

Regardless of your operating system, good practice is to put recently added/changed files in a container (let us call it transfer). Files should be accumulated in transfer until the next backup cycle. Once a backup of that container is obtained, files can finally be moved appropriately to their destined directory. The notes that follow deal with a method of automatically backing up transfer using a server or another hard-drive. It also places emphasis on back-up of Web sites — a task which can become closely-related.

Note: instructions are Linux/Mac-specific, but can be adapted to Windows

Until recently, I used to get gunzipped tar archives of all my sites from CPanel. I did this every morning. Some weeks ago I automated part of the process by getting more crucial (and frequently-changing) pages and storing them remotely. It all works as follows:

Set up a set of batch scripts (let us call them dummy1..2) which include the following commands:


cd /home/roy/Main/Transfer_Archives/Sites/Roy/
wget -r -l1 -t1 -N -np -erobots=off http://schestowitz.com/

If you are not sure what the latter is doing, type in man wget and read the documentation. Then, set up cron jobs which include the following tasks:

Get local copies of important Web pages (see above)
38 23 * * * /home/roy/Main/Transfer_Archives/Sites/dummy1
38 23 * * * /home/roy/Main/Transfer_Archives/Sites/dummy2
...
Compress all the pages
50 23 * * * tar czvf /home/roy/Main/Transfer_Archives/www-`date +%Y-%m-%d`.tar.gz /home/roy/Main/Transfer_Archives/Sites
Make a copy of compressed pages
58 23 * * * cp -rf /home/roy/Main/Transfer_Archives/ /home/server2/transfer/roy

The last line puts a copy on the SAN, just to be 100% covered. Such scripts allow you to sleep while your sites/files are being backed up.

Keyboard Accelerators

Shortcut keysMice are used excessively while much more precise and efficient ways of navigation exist. Generally, when using an application often enough, one needs to learn and practice commonly-used menu accelerators, e.g. CTRL+S to save, or CTRL+ENTER to despatch an E-mail message.

Taking accelerators into a more advanced level, application invocation can be purely keyboard-based.

For Windows users:

Windows allows items located at the desktop to have CTRL+ALT shortcuts assigned to them. I have used this feature extensively for many years. The only flaw is that the desktop rapidly becomes bloated. To get these shortcuts set up, steer towards Properties in the context menu.

Linux/Mac (Panther):

Keyboard shortcuts can be assigned to applications/commands using XBindkeys. Example shortcuts are given in my XBindkeysRC file.

If you are using KDE, you can also use window manager accelerators or mouse gestures, for example ALT+mouse primary buttons to drag windows around.

Recursive Downloads

schestowitz.com: Gallery
How would you download an entire gallery like the one above?

There should no longer be need for repeated downloads.

Have you ever found yourself downloading images from a gallery? A mechanic series of clicks to get images one by one? There is a better way.

The simple method: If you are using Firefox as your Web browser, use the FlashGot extension.
The better method: If you are working under Linux or Mac OS X you can become even more efficient. Use wget as in the example below and replace http://SITE with the Web address to be downloaded from recursively.

wget -r -l2 -t1 -N -np -erobots=off http://SITE

Keep the volume of downloads low or else this will be considered an abuse and frowned upon.

Retrieval statistics: 21 queries taking a total of 0.370 seconds • Please report low bandwidth using the feedback form
Original styles created by Ian Main (all acknowledgements) • PHP scripts and styles later modified by Roy Schestowitz • Help yourself to a GPL'd copy
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