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From Go Package

Install the latest version of CometBFT’s Go package: 
go install github.com/cometbft/cometbft/cmd/cometbft@latest
Install a specific version of CometBFT’s Go package: 
go install github.com/cometbft/cometbft/cmd/[email protected]

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From Binary

To download pre-built binaries, see the releases page.

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From Source

You’ll need go installed and the required environment variables set, which can be done with the following commands: 
echo export GOPATH=\"\$HOME/go\" >> ~/.bash_profile
echo export PATH=\"\$PATH:\$GOPATH/bin\" >> ~/.bash_profile

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Get Source Code

git clone https://github.com/cometbft/cometbft.git
cd cometbft

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Compile

make install
to put the binary in $GOPATH/bin, or use: 
make build
to put the binary in ./build. DISCLAIMER: The binary of CometBFT is built/installed without the DWARF symbol table. If you would like to build/install CometBFT with the DWARF symbol and debug information, remove -s -w from BUILD_FLAGS in the makefile. The latest CometBFT is now installed. You can verify the installation by running: 
cometbft version

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Reinstall

If you already have CometBFT installed and you make updates, simply run: 
make install
To upgrade, run: 
git pull origin main
make install

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Compile with CLevelDB Support

Install LevelDB (minimum version is 1.7). Install LevelDB with snappy (optional). Below are commands for Ubuntu: 
sudo apt-get update
sudo apt install build-essential

sudo apt-get install libsnappy-dev

wget https://github.com/google/leveldb/archive/v1.23.tar.gz && \
  tar -zxvf v1.23.tar.gz && \
  cd leveldb-1.23/ && \
  make && \
  sudo cp -r out-static/lib* out-shared/lib* /usr/local/lib/ && \
  cd include/ && \
  sudo cp -r leveldb /usr/local/include/ && \
  sudo ldconfig && \
  rm -f v1.23.tar.gz
Set a database backend to cleveldb: 
# config/config.toml
db_backend = "cleveldb"
To install CometBFT, run: 
CGO_LDFLAGS="-lsnappy" make install COMETBFT_BUILD_OPTIONS=cleveldb
or run: 
CGO_LDFLAGS="-lsnappy" make build COMETBFT_BUILD_OPTIONS=cleveldb
which puts the binary in ./build.