1.curl https://packages.microsoft.com/config/rhel/6/prod.repo > /etc/yum.repos.d/mssql-release.repo
2.yum remove unixODBC-utf16 unixODBC-utf16-devel #to avoid conflicts
ACCEPT_EULA=Y yum install msodbcsql
3.ACCEPT_EULA=Y yum install mssql-tools
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc
It should be ok here. If not, run the following code again
echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile
echo 'export PATH="$PATH:/ opt/mssql-tools/bin"' >> ~/.bashrc
source ~/.bashrc