1st yum groupinstall X11

###GNOME Desktop Environmen

• yum -y groups install "GNOME Desktop"
• echo "exec gnome-session" >> ~/.xinitrc
• startx

###KDE-Desktop

• yum -y groups install "KDE Plasma Workspaces"
• echo "exec startkde" >> ~/.xinitrc
• startx

###Xfce Desktop Environment

• yum --enablerepo=epel -y groups install "Xfce"
• echo "exec /usr/bin/xfce4-session" >> ~/.xinitrc
• startx

###set default startx

• on centos6 vim /etc/inittab
• change the number in the line id:3:initdefault: from a 3 to a 5
• on centos7
• systemctl get-default multi-user.target: analogous to runlevel 3 /etc/inittab
• systemctl set-default graphical.target

###change en33 to old eth0

• vi /etc/default/grub At the end of GRUB_CMDLINE_LINUX line append "net.ifnames=0 biosdevname=0"
• grub2-mkconfig -o /boot/grub2/grub.cfg
• reboot

###install python35

• yum install -y python35u python35u-libs python35u-devel python35u-pip
• which -a python3.5
• /bin/python3.5
• /usr/bin/python3.5

###python35 virtualenv

• virtualenv -p /usr/bin/python3 py3env
• source py3env/bin/activate
• pip install package-name

###my prompt

• PS1='[\e]0;\w\a]\n[\e[32m]\u@\h $(date +%F*%T) [\e[33m]\w[\e[0m]\n$ '

** edit ~/.config/terminator/config

[layouts]

[[default]]

[[[root]]]
  position = -4:0
  type = Window
  order = 0 
  parent = ""
  size = 1072, 1884

[[[grand]]]
  position = 536 
  type = HPaned
  order = 0 
  parent = root
[[[left]]]
  position = 942 
  type = VPaned
  order = 0 
  parent = grand
[[[right]]]
  position = 942 
  type = VPaned
  order = 1 
  parent = grand



[[[terminal1]]]
  profile = default
  type = Terminal
  order = 0 
  parent = left
  command = "cd ~/code/foo; bash"
[[[terminal2]]]
  profile = default
  type = Terminal
  order = 1 
  parent = left
  command = "cd ~/bar/baz; bash"



[[[terminal3]]]
  profile = default
  type = Terminal
  order = 1 
  parent = right
  command = ""
[[[terminal4]]]
  profile = default
  type = Terminal
  order = 0 
  parent = right
  command = "cmus; bash"

###don't save history before space

• export HISTCONTROL=ignorespace