Dynamic libraries in Linux

See this nice post and solution to common problems.

https://codeyarns.com/2014/01/14/how-to-add-library-directory-to-ldconfig-cache/

Command output to a file in several ways!

Command output to a file in several ways!

The link bellow contains an excellent table to show all the possibilities to do that: 
https://askubuntu.com/questions/420981/how-do-i-save-terminal-output-to-a-file

Download Youtube videos

Download Youtube videos online maintaining the quality for free
http://keepvid.com/

Cmake versus Make

https://prateekvjoshi.com/2014/02/01/cmake-vs-make/

Info of your hardware

Gui of your hardware in ubuntu:
lshw-gtk

Information about your display hardware in command line

sudo lshw -C display

Info of CPU

cat /proc/cpuinfo 

Library check

How to check a library in the system and its version

http://serverfault.com/questions/54736/how-to-check-if-a-library-is-installed

ssh 7.2 on ubuntu 14/.4

How to install a version out of current official repositories of ssh into ubuntu

http://stackoverflow.com/questions/36453976/upgrade-openssh-7-2p-in-ubuntu-14-04