Install NVIDIA Driver for Linux on CentOS 7 And Solve X Desktop Problem

Follow this guide: Install proper drivers for Graphic cards

Important: Issue caused X server when install nvidia driver

" Most important, what resolved the issue, is at the bottom of that first URL: Use the correct nvidia_driver_xx.run file, INCLUDING the flag --no-opengl-files (and select no when prompted whether you want an nvidia generated xorg.conf file)"

Installing Problem "You appear to be running an X server; please exit X before installing." and its solution

## stop gdm service and init 3
  261  systemctl status gdm
  262  systemctl stop gdm
  263  init 3
  264  sh NVIDIA-Linux-x86_64-390.116.run
  265  nvidia-smi

Reference: 

• "As the error states, you are still running an X server. This error occurs when you try to install the Nvidia .run files while logged in." 

Regenerate nividia driver

yum install dkms
# 418.87.00 driver version is found in /usr/src/nvidia-
dkms install -m nvidia -v 418.87.00

• Lost nvidia driver module and recompile from source: refer to for ubuntu and for centos 

Problem: X desktop has problem

Solution: 

1.  Enter BIOS setting and set OnBoard in Miscellenous Configuration 
2. DO NOT USE nvidia-xconfig and delete /etc/X11/xorg.conf ("The real question is why you want to create a conf file if it is working fine without one? What problem are you trying to solve?"[link]) 

Install MPICH on CentOS 7

Download: mpich download

Install guide: install guide or version 3.3.2 

操作记录：
  405  wget http://www.mpich.org/static/downloads/3.3.2/mpich-3.3.2.tar.gz
  406  ls
  407  tar xzf mpich-3.3.2.tar.gz
  408  ls
  409  ls mpich-3.3.2
  410  cd mpich-3.3.2
  411  ls
  412  ./configure --prefix=/opt/mpich-3.3.2
  413  make -j 2>&1 | tee m.txt
  414  make install |& tee mi.txt
  415  ls
  416  history

$ pwd
/etc/modulefiles

[root@localhost/etc/modulefiles]$ cat mpich/3.3.2
#%Module1.0#####################################################################
##
## modules anaconda/4.9.0
##
## modulefiles/anaconda/4.9.0
##
proc ModulesHelp { } {
        global version prefix

        puts stderr "mpich/3.3.2 - sets the Environemt for mpich/3.3.2"
}

module-whatis   "Sets the Environemt for using mpich/3.3.2"

set topdir /opt/mpich-3.3.2

prepend-path PATH $topdir/bin
prepend-path LD_LIBRARY_PATH $topdir/lib

How To Install Anaconda On CentOS 7

Refer to How To Install Anaconda On CentOS 7