Installing Google Chrome on CentOS 7.0 / 6.x

Create /etc/yum.repos.d/google-chrome.repo

Check if latest version of Chrome available from Google's repository by
# yum info google-chrome-stable

# yum install google-chrome-stable
This will fail.

Sadly, the Google Chrome browser no longer supports the most famous commercial distribution RHEL 6.x and its free clones such as CentOS and Scientific Linux.

However, there's this script by Richard Lloyd that

automatically download and install latest Google Chrome browser by picking libraries from a more recent released distro and put those libraries in (/opt/google/chrome/lib) directory and then you can able to run Google Chrome on RHEL/CentOS 6.x versions.

# wget http://chrome.richardlloyd.org.uk/install_chrome.sh

# chmod u+x install_chrome.sh

# ./install_chrome.sh


References
http://www.tecmint.com/install-google-chrome-on-redhat-centos-fedora-linux/

OpenFOAM 2.3.0 in Fuji

System: Fuji (Upgraded - CentOS 6.5)
Note: I used OpenMPI here for this test installation. Default MPI in Fuji is Intel MPI.

Download:
OpenFOAM-2.3.0.tgz
ThirdParty-2.3.0.tgz

Setting up GCC 4.9.1

GCC 4.9.1 is available from /apps/GNU/GCC/4.9.1

$ export PATH=/apps/GNU/GCC/4.9.1/bin:$PATH

$ export LD_LIBRARY_PATH=/apps/GNU/GCC/4.9.1/lib64:/apps/GNU/GCC/4.9.1/lib:/apps/GNU/MPC/1.0.2/lib:/apps/GNU/GMP/6.0.0/lib:/apps/GNU/MPFR/3.1.2/lib:$LD_LIBRARY_PATH

Setting up OpenFOAM Installation

$ mkdir ~/scratch/OpenFOAM

Download the OpenFOAM and ThirdParty into this directory.

$ tar -xzvf OpenFOAM-2.3.0.tgz
$ tar -xzvf ThirdParty-2.3.0.tgz

$ export FOAM_INST_DIR=~/scratch/OpenFOAM
$ foamDotFile=$FOAM_INST_DIR/OpenFOAM-2.3.0/etc/bashrc
$ [ -f $foamDotFile ] && . $foamDotFile


$ cd $FOAM_INST_DIR
$ mkdir obj
$ cd obj
$ ../OpenFOAM-2.3.0/Allwmake

Testing

Notice that all the executables, e.g. icoFoam, are installed on $FOAM_INST_DIR/bin.


In the remote machine, set the .bashrc to include:

export FOAM_INST_DIR=$HOME/scratch/OpenFOAM
source $FOAM_INST_DIR/OpenFOAM-2.3.0/etc/bashrc


To run a test parallel OpenFOAM on 2 nodes:

$ mkdir -p $FOAM_RUN

$ cp -r $FOAM_TUTORIALS $FOAM_RUN

$ cd $FOAM_RUN/tutorials/incompressible/icoFoam

$ cp -r cavity cavityParallel

Copy $WM_PROJECT_DIR/applications/utilities/parallelProcessing/decomposePar/decomposeParDict to cavityParallel/system

Edit the decomposeParDict:
numberOfSubdomains  2;
method simple;

$ cd cavityParallel

$ blockMesh

$ cd ..

$ decomposePar -case cavityParallel

$ cd cavityParallel

$ echo -e 'fuji381\nfuji382' > hosts

$ mpirun -f hosts -np 2 icoFoam -parallel

Installing OFED on Linux (CentOS 6.5)

As the title suggests, I will show how to install OFED stack on CentOS 6.5.

Prerequisites

kernel-devel
rpm-build
libtool
gcc-c++
bison
flex
glib2-devel
glib2
tcl-devel
zlib-devel

Tips:

• To prevent build error, make sure your gcc version is your kernel's latest.
• It's recommended to use the latest kernel from the repo.

Download OFED software from https://www.openfabrics.org/index.php

Extract and run install.pl (--help to see options)

After installation, do a reboot

Some points:

• The openib daemon controls which module to load at startup.
• ibstat can be used to check if card (mlx - mellanox, qib - qlogic) is up
• ibhosts and iblinkinfo may be useful
• ibping the other nodes for sanity checking. See http://hpc-sw.blogspot.sg/2014/09/setting-up-two-node-hpc-cluster-with.html

Typically, locked memory limit has to be set to unlimited to be able to run HPC MPI jobs across nodes. 

Add the following to /etc/security/limits.conf:

* soft memlock unlimited
* hard memlock unlimited

Exit the shell and you should have:
$ ulimit -l
unlimited

Compiling Linux Kernel 3.16.1 for CentOS 7.0 on Haswell Server

Background: I would like to upgrade the existing kernel for CentOS 7.0 (3.10.0-123.6.3.el7.x86_64) to 3.16.1 (latest kernel from kernel.org - not available in repo yet).


Download the latest kernel from www.kernel.org into /usr/src/kernels. Untar and change into the kernel directory (in this case is linux-3.16.1).

Install the necessary packages:
$ yum groupinstall "Development Tools"
$ yum install ncurses ncurses-devel

Do a proper cleanup:
$ make mrproper

Copy current kernel config (in /boot) to .config (in working dir) as a base to use.
Note that 'make mrproper' deletes .config
$ cp /boot/config-3.10.0-123.el7.x86_64 .config

Edit the configuration further if needed:
$ make menuconfig

To adjust compiling to the number of your CPU cores (for faster compilation time):
$ export CONCURRENCY_LEVEL=`getconf _NPROCESSORS_ONLN`

Compile and build the rpms
$ make rpm

Install the kernel
$ rpm -ivh /root/rpmbuild/RPMS/x86_64/kernel-2.6.32.27-1.x86_64.rpm


This should set up the initrd and grub settings. If not, manually do these:
$ mkinitrd /boot/initrd-3.16.1.img 3.16.1
$ grubby --add-kernel=/boot/vmlinuz-3.16.1  --initrd=/boot/initramfs-3.16.1.img --title="CentOS Linux 7.0 3.16.1" --make-default --copy-default