When i was tring to update a remote system by using  yum,it returns an error message:<br>
<span style="font-style: italic;">yum update</span><br style="font-style: italic;">
<span style="font-style: italic;">Setting up Update Process</span><br style="font-style: italic;">
<span style="font-style: italic;">Setting up Repos</span><br style="font-style: italic;">
<span style="font-style: italic;"><a href="ftp://ftp.oss.eznetsols.org/linux/fedora/3/i386/os/repodata/repomd.xml">ftp://ftp.oss.eznetsols.org/linux/fedora/3/i386/os/repodata/repomd.xml</a>:
[Errno 4] IOError: &lt;urlopen error (-2, 'Name or service not
known')&gt;</span><br style="font-style: italic;">
<span style="font-style: italic;">Trying other mirror.</span><br style="font-style: italic;">
<span style="font-style: italic;">Cannot open/read repomd.xml file for repository: base</span><br style="font-style: italic;">
<span style="font-style: italic;">failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.</span><br>
<br>
what's wrong with that?<br>