centos修改终端分辨率

原文地址https://superuser.com/questions/816528/with-centos-7-as-a-virtualbox-guest-on-a-mac-host-how-can-i-change-the-screen-r

1. Make yourself root: sudo su
2. vi /etc/default/grub
3. In Vi, press i or Insert-key on your keyboard to enter the edit mode.
4. Add vga=792 inside the "-quotes for GRUB_CMDLINE_LINUX, f.ex. GRUB_CMDLINE_LINUX="crashkernel=auto rhgb quiet vga=792"
5. Press Esc and type :wq and hit Enter to save and exit Vi.
6. grub2-mkconfig -o /boot/grub2/grub.cfg
7. reboot