VIM: Jump Back To Previous or Last Cursor Position

Writing shell scripts in vim I usually go search for functions or something. Copy lines and then go back to where I was and modify the code. However, I need to manually navigate way back to the previous / last position. How can I automatically go back to where I was when I started my search operation under vim?
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RHEL / Centos 6 – Install Nginx Using Yum Command

How can I install Nginx web server On CentOS Linux 6 or Red Hat Enterprise Linux 6 using the yum command?
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Ubuntu: Mount The Drive From Command Line

I‘m new to Ubuntu Linux. How do I mount the hard disk drive from command line?
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How To Use UUID To Mount Partitions / Volumes Under Ubuntu Linux

Q. Can you explain UUID concept related to Linux ext3 partitions and storage devices? How do I update /etc/fstab using UUID under Ubuntu Linux or any other Linux distro?
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Setting Up a CentOS / Red Hat Linux DHCP Client

Q. How do I setup my Red Hat / CentOS / Fedora Linux system to get IP address and other information via a DHCP server for eth0 interface?
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