Ubuntu

In this section you will perform a quick installation of easifem library and run some sample programs.

Following steps are performed in this section.

• Installing easifem command line interface.
• Set up the environment variables by using easifem CLI.
• Install easifem library.

summary

It is recommended that you read and follow the steps given below to quickly install easifem. However, due to any reason, if you do not want to read the instruction given below, then just copy and paste the command given below.

sudo apt-get update && \
sudo apt-get install -y gfortran gcc libomp-dev curl git \
python3 python3-pip cmake ninja-build \
liblapack-dev libopenblas-dev libhdf5-dev \
libplplot-dev plplot-driver-cairo libboost-all-dev \
gnuplot doxygen libgtk-4-dev lua5.4 liblua5.4-dev \ && 
python3 -m pip install easifem && \
easifem setenv -i ~/.easifem/install -b ~/.easifem/build -s ~/.easifem/src && \ 
source ~/.config/easifem/easifemvar.sh && \ 
easifem install easifem

Build from source

Step 1: install system dependencies

sudo apt-get update && \
sudo apt-get install -y gfortran gcc libomp-dev curl git \
python3 python3-pip cmake ninja-build \
liblapack-dev libopenblas-dev libhdf5-dev \
libplplot-dev plplot-driver-cairo libboost-all-dev lua5.4 liblua5.4-dev \
gnuplot doxygen libgtk-4-dev

Step 2: Install easifem CLI

python3 -m pip install easifem

Step 3: Setting up environment variables

easifem setenv -i ~/.easifem/install -b ~/.easifem/build -s ~/.easifem/src

If your active shell is zsh or bash, then please run the following command.

for bash or zsh shell only

# add to ~/.bashrc or ~/.zshrc
source ~/.config/easifem/easifemvar.sh

If your active shell is fish, then run the following command.

for fish shell

# add to ~/.config/fish/config.fish
source ~/.config/easifem/easifemvar.fish

Check your shell

You can check your active shell by using the following command.

echo $SHELL

Now, you need to modify the shell file by adding following lines.

Click here to to know more about the environment variables

• option -i denotes the location of file system where easifem will be installed.
• -b denotes the location of file system where easifem build files will be stored.
• -s denotes the location of file system where easifem source file will be downloaded.

You can learn more about the easifem environment variables here.

Click here to see how to modify the shell(recommended)

If you do not want to source the easifemvar files every time you open a new terminal window, then please add following lines to your shell configuration.

Bash Shell

If you are using Bash shell, then you can place easifemvar.sh in your shell. Open ~/.bashrc in the editor, and add the following line at the end of the file.

source ${HOME}/.config/easifem/easifemvar.sh

• Save the file and exit.
• Restart your terminal.

Zsh Shell

If you are using the Zsh shell, then you can place easifemvar.sh in your shell. Open ~/.zshrc file in the editor, and add the following line at the end of the file:

source ${HOME}/.config/easifem/easifemvar.sh

• Save the file and exit.
• Restart your terminal.

Fish Shell

If you are using Fish shell, then you can place easifemvar.fish in your shell. For fish shell, open ~/.config/fish/config.fish in the editor and add the following line at the end of the file:

source $HOME/.config/easifem/easifemvar.fish

• Save the file and exit.
• Restart your terminal.

Step 4: Install easifem

easifem install easifem