Goautodial
 

I installed Goautodial,it was very well instalation,but when I try to do the following:
#yum update

I receive this wrong
[root@go ~]# yum update
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/extras/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: extras
[root@go ~]#

I need help,Iam new guy in Linux OS.

What version/distro of Linux are you using?? Several use YUM, but without knowing details we can't give relevant advice.

Version of Centos
 

[root@go ~]# cat /etc/redhat-release
CentOS release 5.10 (Final)
You have new mail in /var/spool/mail/root

Ok, so not surprised at all. There ARE no repositories for CentOS 5.x any longer; its End-of-life, and no longer supported. I'd advise you to take backups of your data, and do a fresh install of the latest CentOS instead.