My Ubuntu boots to GUI mode by default. How to make Ubuntu Linux boot to text mode?
If you are using Ubuntu older than 16 such as Ubuntu 14.04:
Edit /etc/default/grub
Change GRUB_CMDLINE_LINUX=... to GRUB_CMDLINE_LINUX="text".
Backup your old grub config`$ sudo cp -n /etc/default/grub /etc/default/grub.bak-date +%s `
Update grub$ sudo update-grub
If you are using Ubuntu 16.04 which uses systemd, please follow this tutorial:
How to Change Systemd Boot Target on Linux
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