[MehdiGana]

Hi someone have the solution of this problem : when to do this command : " sudo apt-get install build-essential gfortran unzip make wget openmpi-bin openmpi-dev
"
"Warning: Repository 'Main Update Repository' appears to be outdated. Consider using a different mirror or server.
Warning: Repository 'Update Repository (Non-Oss)' appears to be outdated. Consider using a different mirror or server.
Reading installed packages...
Package 'build-essential' not found.
Package 'openmpi-bin' not found.
'make' is already installed.
No update candidate for 'make-4.2.1-lp151.7.39.x86_64'. The highest available version is already installed.
'unzip' is already installed.
No update candidate for 'unzip-6.00-lp151.5.1.x86_64'. The highest available version is already installed.
'wget' is already installed.
No update candidate for 'wget-1.20.3-lp151.5.3.1.x86_64'. The highest available version is already installed.
'openmpi-devel' is already installed.
No update candidate for 'openmpi-devel-1.10.7-lp151.11.4.x86_64'. The highest available version is already installed.
'gfortran' not found in package names. Trying capabilities.
No provider of 'gfortran' found.
Resolving package dependencies...
"

[valgrinda]

I don't think this command is in the manual. Just try again the installation instructions in the User Guide.