Due to some company policy, I cannot connect my Centos linux computer to the internet. However, I would like to set up a TFTP-Server, and I saw a tutorial that does this here. http://n40lab.wordpress.com/2014/01/29/centos-6-5-installing-a-tftpd-server-for-uploading-configuration-files/Once I run yum install it goes and searches for the dependancy files on the internet. My question is : Is there any way for me to install TFTP-Server without connecting to the internet? 
Install TFTP-Server without Internet
centos;tftp
Make a note of the packages that yum wanted to download.  Use an Internet connected machine to download those packages.  Place them on an CD/DVD/USB-stick and import them into your CentOS machine.cd to the directory where you've imported them and run:yum install <package-1> <package-2>I did a quick test on my CentOS 7 machine and the packages consisted of xinted and tftp-server therefore it should be easy enough.Another option would be to download the full ISOs of CentOS and burn to DVD.  Then configure the CentOS machine to use that as a repo. Bear in mind that the packages will be relatively dated (as I write, they are 9 months old).Finally, you could rsync a repository's Packages and repodata directories onto a large USB-stick or a USB HDD, then mount this on your CentOS system. Create a .repo file that points to this mount and install tftp-server.  This will have the advantage that the package will be the latest available.  You could even yum update the whole server.