下载protobuf-2.4.1.tar.gz:

安装:
tar zxvf protobuf-2.4.1.tar.gz
cd protobuf-2.4.1
./configure
make
make check
make install
安装结束。
验证:
查看是否安装成功:protoc --version
如果出现:libprotoc 2.4.1 则说明安装成功!
如果出现错误:

protoc: error while loading shared libraries: libprotobuf.so.0: cannot open

shared object file: No such file or directory

The issue is that Ubuntu 8.04 doesn't include /usr/local/lib in

library paths.
To fix it for your current terminal session, just type in
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib