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I have an EC2 Instance of Ubuntu 14.04 Fails to restart after stop/restart. It was upgraded from 13.x and apparently AWS has the web ui setup to send a 'reboot now' command which instructs 14.04 to enter into this modified boot.

I can dismount the drive, remount it to another instance and manually reset the single user flag if I could only figure out where that setting lives. Thanks in advance.

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2 Answers 2

You can use the shutdown command to drop it into the init level you want. From the command line, issue "shutdown -h now -i 1". Replace the "1" with whatever init level you'd like. 1 is single user mode, 6 is reboot, etc.

Or, you can create an /etc/inittab file with id:S:initdefault: in it and reboot. Ubuntu uses Upstart, not sysinit, but it'll parse the file just the same (/etc/init/rc-sysinit.conf tells it to look and see if one exists, just in case).

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Thanks for the response option #2 looks like its headed in the right direction for this particular situation with AWS. If I'm understanding this correctly though, wouldn't it be 'id:2:initdefault:' to get it out of single user mode and back to normal operation? –  user3546849 Jul 19 '14 at 23:52
    
To get it back to normal boot you can always edit the file and just comment out that line before rebooting it again. –  DarkStar74 Jul 20 '14 at 11:58

After booting up the system, select the boot option you want in grub and press 'e'. Then type "Single" and hit enter.

Point of interest, however: Ubuntu 14.04 is not Linux 14.04, it's Linux 3.13.0.

edit to respond to comment: alright, I thought your system wasn't booting at all, just type init 1 if you need to go from multiuser to single user mode. The config file you're looking for is in /boot/grub/grub.cfg.

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I don't have access to the bootloader, this is an AWS ec2 instance so I don't have direct console access. –  user3546849 Jul 19 '14 at 22:47
    
btw... Ubuntu is based on Debian which is a community driven Linux distro. The latest version is 14.04 (releases.ubuntu.com/14.04). Still looking for the location of the config file that controls the boot mode. –  user3546849 Jul 19 '14 at 22:56
    
okay, see the edit. –  mortabis Jul 19 '14 at 23:02

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