How can I install emacs 27 in ubuntu LTS (18.04.1)?

Solution 1:

Here's how I compiled it from source on Ubuntu 16.04 (there's also instructions in the Emacs documentation):

# https://stackoverflow.com/questions/338317/what-is-makeinfo-and-how-do-i-get-it
sudo apt install --yes texinfo
# https://stackoverflow.com/questions/55297581/build-emacs-ubuntu-libraries-not-found
sudo apt install --yes libxpm-dev libjpeg-dev libgif-dev libtiff-dev libgnutls28-dev

git clone https://git.savannah.gnu.org/git/emacs.git /tmp/emacs \
    && cd /tmp/emacs \
    && git checkout emacs-27 \
    && ./autogen.sh && ./configure && make \
    && mv ./src/emacs /usr/bin/emacs \
    && rm -rf /tmp/emacs

Also, if you want to use Doom Emacs, you'll also need:

# rg
# https://github.com/BurntSushi/ripgrep/releases
curl -LO https://github.com/BurntSushi/ripgrep/releases/download/11.0.2/ripgrep_11.0.2_amd64.deb \
    && sudo dpkg -i ripgrep_11.0.2_amd64.deb \
    && rm ripgrep_11.0.2_amd64.deb
# fd
# https://github.com/sharkdp/fd/releases
curl -LO https://github.com/sharkdp/fd/releases/download/v8.1.1/fd-musl_8.1.1_amd64.deb \
    && sudo dpkg -i fd-musl_8.1.1_amd64.deb \
    && rm fd-musl_8.1.1_amd64.deb

git clone --depth 1 https://github.com/hlissner/doom-emacs ~/.emacs.d
~/.emacs.d/bin/doom install

Solution 2:

snap install emacs --beta --classic