I Want to tell you Step by Step to Install The "TARBALL" files, Easy & Simple.
First,The Tarball Files is Like This "squid_2.7.stable5.tar.gz" (Example).
And then,Extract it by type this on your terminal :
tar -xvzf squid_2.7.stable5.tar.gz
After that,You must go into the "squid_2.7.stable5.tar.gz" directory.
You Must Configure It First Before Install it.
The Last Step is Install It,Do it By Type this :
make && make install
Remember to Do the Configure & Install Step in The Directory.