i used ns-allinone-2.29.tar.gz and fedora 13 as the os:
here are the steps for successfull installation:
1. You need to edit two of your repository files: (1) /etc/yum.repos.d/fedora.repo and (2)
/etc/yum.repos.d/fedora-updates.repo. While editing comment (put #) all the lines that start with
'mirrorlist' and un-comment (delete #) all the lines that start with 'baseurl'. Save both the files and
close them.
2. Once the step given above...