macosx

How to Reduce Computer Eye Strain

1 year ago

by linuxandfriends in Computers, health, linux, macosx, open source, software, ubuntu, windows

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.
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eye strain

Cron – A Job Scheduler In Linux

1 year ago

by linuxandfriends in commands, linux, macosx, open source, software, unix

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.

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job scheduler

bcrypt – A Good File Encryption Tool

1 year ago

by linuxandfriends in commands, linux, macosx, open source, security, software, unix, windows

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.
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bcrypt cryptology file encryption

Easily Find And Replace Text Across Multiple Files

2 years ago

by linuxandfriends in commands, linux, macosx, productivity, tutorials, unix

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.

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perl text files

Phatch – Batch process thousands of images at once

3 years ago

by linuxandfriends in graphics, linux, macosx, open source, software, windows

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.

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batch convert images batch image resize batch process images

wkhtmltopdf – Convert webpage to PDF in Linux

3 years ago

by linuxandfriends in commands, linux, macosx, software, windows

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.

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convert html to pdf

100 Free useful tools for Mac OS X

4 years ago

by linuxandfriends in macosx, software

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.

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apple free tools