Nov 18, 2014

Interactive on RHEL / Centos 7 (grub2)

Edit boot entry
  At boot menu, press "e" to edit a boot entry, go to the line beginning with "linux".

Add "systemd.confirm_spawn=1", remove "rhgb quiet"
  linux16 /vmlinuz-3.10.0-123.9.3.el7.x86_64 root=/dev/mapper/ol-root ro crashkernel=auto vconsole.font=latarcyrheb-sun16 rd.lvm.lv=ol/swap rd.lvm.lv=ol/root vconsole.keymap=us rhgb quiet LANG=en_US.UTF-8 systemd.confirm_spawn=1

Continue to boot up linux
  Press ctrl-x to continue the boot process. The system will now ask interactively which services are to be started.

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