1#deb [trusted=yes] http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic main 2#deb-src [trusted=yes] http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic main 3#deb [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic main 4#deb-src [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic main 5#deb [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-4.0 main 6#deb-src [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-4.0 main 7#deb [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-5.0 main 8#deb-src [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-5.0 main 9