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.

bash/zsh

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.

For bash/zsh shell

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 golang-go \ && 
git clone https://github.com/easifem/config.git  ~/.config/easifem && \
source ~/.config/easifem/easifemvar.sh && \
easifem install extpkgs base classes

fish

For fish shell

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 golang-go \ && 
git clone https://github.com/easifem/config.git  ~/.config/easifem && \
source ~/.config/easifem/easifemvar.fish && \
easifem install extpkgs base classes

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 golang-go

Step 2: Install easifem CLI

You can read more about easifem command line interface here

caution

make sure go language is installed.

go install github.com/easifem/easifemgo

Now easifemgo is installed on your system mostly at ~/go/bin/easifemgo

info

It is recommended that you make a symlink or alias of easifemgo with name easifem. In the following text easifem would mean easifemgo

Check

easifem --help

Step 3: Setting up environment variables

To configure easifem and to get snippets it is better to clone the git repository from github.com/easifem/config to $HOME/.config/easifem by using following.

git clone https://github.com/easifem/config.git  ~/.config/easifem

You can read more more about the configuration files here.

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 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 extpkgs base classes