I had a dual-boot system of Ubuntu 14.04 and Linux mint 18. From grub I used to be able to choose Ubuntu, or Linux mint 18 on sda2. Recently, I deleted the Ubuntu partition, which was on sda3, but now whenever I boot my computer, grub2 doesn't know what to do and I just get the grub2 command line. I'm not sure what course of action I need to take to boot into Linux Mint, which has all my files. If any more information about something is needed, I can probably provide it. Thanks 
Cannot boot into system on sda2
linux;boot;grub2