You might suffer from eye strain if your job involves working on a computer for long hours. This is especially true if you stare at the computer monitor sitting in a dimly lit room.
One of the best ways of reducing computer eye strain is to change the colour of your monitor in relation to the time at your place.
Cron is a time based task or job scheduler available on Linux/Unix operating systems.
A job scheduler executes tasks on your computer at adjustable regular intervals.
What this means is – suppose you have to carry out a task on your computer that needs to be repeated at regular intervals, then you can pass the task to
cron and it will execute the task at the given time and date.
Bcrypt is a cross platform file encryption tool that uses the Blowfish encryption algorithm. One of the chief advantages of using bcrypt (apart from the security aspect) is that it runs on a wide variety of OS platforms and hardware architectures. This includes Windows, Linux, Mac OS X, BSD, HP-UX etc. This means, you can encrypt the file in say Linux, and then move the encrypted file to a machine running Windows and decrypt the file over there.
If you are stuck with a bunch of text files which contain a factual error and you urgently need to correct the same, then the obvious recourse would be to open each text file individually and search and replace the text. This process is very laborious and time consuming especially if the number of text files runs in 10s and 100s.
Phatch is a photo batch processor with a nice graphical user interface. It supports all popular image formats and can duplicate folder hierarchies which makes it ideal for identically manipulating 1000s of images in one go. It can also be used to rename exif data in your photos. Phatch is based on Python and will work in Windows, Mac OS X, and Linux.
Wkhtmltopdf is a command line utility that can be used to convert a webpage / html to PDF. Here is how it works…
Suppose I want to convert this website home page to a PDF document, I can fire up a terminal and run the
wkhtmltopdf command as follows.
Apple’s Mac OS X is an operating system built on top of a Unix base. While it is a swell operating system which enjoys the power of the Unix coupled with enhanced usability; the operating system itself is proprietary and can be run (legally) only on Apple’s costly hardware.