Portage emerge reference
From thelinuxwiki
installing a specific version of a package
done using an "atom" (see manpage)
example: # emerge package_name =package_name-version.number
manually installing a package without internet access
1. On a box with Internet access, fetch the distfile. First, use emerge fetch the install source for you...
emerge --fetchonly <package>
Next, use wget to download the file.
2. Upload the file to the /usr/portage/distfiles/ directory on the machine you intend to install the package on
- note This procedure does not take package dependencies into account! ***
