how to install bazel in ubuntu?

standard version:-
$ echo "deb [arch=amd64] http://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
$ curl https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
$ sudo apt-get update && sudo apt-get install bazel
$ sudo apt-get upgrade bazel

customized version:-

$ BAZEL_VERSION="0.26.0"     # insert your desired version here, for example 0.26.0
$ wget https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh   # if not on x86_64, change that too
$ chmod +x bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh   # or the file you just downloaded
$ ./bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh --user
$ bazel version   # this should now print the same as BAZEL_VERSION