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Rename multiple files and remove some characters
Sometimes you have to rename multiple files and remove some characters. For instance After compressing images you have multiple jpg files with "min" characters: file1.jpg -> file1.min.jpg file2.jpg -> file2.min.jpg file3.jpg ->...
Batch converting images in command line
Today I wanted to resize some pictures. I always use command line and "convert" to do it. Usually I type this: convert pix1.jpg -resize 1024 resized_pix1.jpg This command resizes me picture to 1024 pixels in width. Today I wanted do...
How to setup SSH server on Ubuntu 16.04
First of all - what is SSH? Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Wikipedia said... Imagine this situation: you have server at your office and you are at home. You...
Synchronize data in Ubuntu using rsync
Last time I bought a desktop PC to my small office. I wanted to have a PC which will be always in my office, because getting notebook every time is not comfortable. So I bought Dell OptiPlex 760 Form Factor (FF) with this configuration: Intel®...
Caffeine doesn’t work on Ubuntu
I tried to use Caffeine - a simple app which prevents running screen saver and locking display. I installed it from the Software Center but it didn't work. The display always locks even when Caffeine was active. First make sure you removed all...
Not enough free disk space on boot
Sometimes when you want to update your Ubuntu you see this: Not enough free disk space Please free [...] disk space on /boot It means that you have old kernels on your /boot partition. You should clean system and delete old kernels. Maybe...
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