Firstly, I followed this video (https://www.youtube.com/watch?v=METZCp_JCec) to install arch, but when I create fstab with genfstab -p /mnt >> /mnt/etc/fstab the error No such file or directory is shown. So I changed the code genfstab -p /mnt >> /mnt/fstab, the file was successfully created with the change, but I can't do the next installation step and how can I delete that created fstab file. I followed Mounting /dev/sda3 but /etc/fstab not found? answers but it didn't work. Why is that /etc/ path missing? 
I can't create fstab while installing arch
linux;arch linux;mount