This page is for tips for great stuff on internet, usefull for developers.

• [Markdown basics] (https://help.github.com/articles/markdown-basics/) -- github markdown basics
• [QGit] (http://linoxide.com/ubuntu-how-to/install-qgit-viewer-ubuntu-14-04/)
• [Got Proxy] (http://xmodulo.com/how-to-use-git-behind-proxy-on-ubuntu.html)

• git init -- init a git server
• git status -- git status
• git add . -- stage a folder
• git log -- check git log
• .gitignore -- git ignore file
• git branch 'mybranch' -- git create a branch
• git chekcout 'mybranch' -- git swap to a branch
• git chekcout master -- git swap to master
• git merge mybranch -- git merge mybranch to master
• git clone https://github.com/tecbea/devtools.git -- git clone a git from a url repo
• git push -- puch changes to server, after stage and commit
• git fetch -- get changes from remote server
• git linux clients --

Cassandra is great to work when using a lot of writes. Some tips on tunning and support.

• Compaction -- When to Use Leveled Compaction

• nmap -Pn -- display open ports on a host

• sudo apt-get install kismet -- ubuntu wifi sniffer

• goto uau sudo ifconfig wlan0 down sudo iwconfig wlan0 mode monitor iwconfig wlan0 sudo ifconfig wlan0 up sudo tcpdump -i wlan0 -n -w file.cap

• back to normal sudo ifconfig wlan0 down sudo iwconfig wlan0 mode managed sudo ifconfig wlan0 up iwconfig wlan0

• sudo apt-get install wavemon -- ubuntu wifi sniffer

• watch -n 1 iwconfig wlan0 -- ``

• wavemon -i wlan0 -- ``

• mapdata -- highcharts maps
• [leafletjs] (http://leafletjs.com/examples/geojson.html) -- maps, geojson
• [visjs] (http://visjs.org/) -- Hierarchical Layout
• [d3js wrapper] (http://c3js.org/) -- c3.js