Node.js/NPM/Hexo

• check if GCC has been installed: sudo yum install gcc gcc-c++
• Download tar.gz file from Node.js website and extract it
• In terminal, go to this folder, then do ./configure to configure software
• do make to make this software
• do sudo make install to install node.js
• Check success: node --version npm --version
• do sudo npm install -g hexo to install Hexo. My sudo not work right so I did su to be root first, then do npm install -g hexo.
  
  Ruby/Jekyll
• Install Dependence: sudo yum install gcc g++ make automake autoconf curl-devel openssl-devel zlib-devel httpd-devel apr-devel apr-util-devel sqlite-devel
• Install Dependence: sudo yum install ruby-rdoc ruby-devel
• Ruby:sudo yum install ruby
• RubyGem: sudo yum install rubygems
• Jekyll: gem install jekyll

Development Softwares

• Dropbox: install from Dropbox website. After installation, you may get error when you do sudo yum update, showing rpm is not found. To solve this problem, do cd /etc/yum.repos.d to go to repos folder, then do mv dropbox.repo dropbox to rename existing repo

Virtual Box Usage

• If you use virtual box, the way to add Guest Additions to CentOS7 is: In virtual box menu bar, select Devices -> Insert Guest Additions Image..., then in CentOS7, a iso file will automatically run. You just need to give allowance then wait to the end of installation. If you find screen resolution not change, shutdown vm then adjust RAM a littble bit in settings. Make sure 3D acceleration is enabled. The re-start VM.

Commmand

• whereis XXX: check program location
• which XXX: check if program is in $PATH
• Temporary Add to PATH: echo $PATH -> PATH=$PATH:/usr/... (no space) -> export PATH