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I fired up my old Ubuntu system and it asked if I wanted to update. I did. When booting up it gave me the red screen and then just the below screen. The computer is a Dell Inspiron 530 that also has Windows Vista as an alternative boot.

mount: mounting /dev/loop0 on /root failed: Invalid argument
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory
mount: mounting /proc on /root/proc failed: No such file or directory
Target filesystem doesn't have requested /sbin/init.
No init found. Try passing init= bootarg.

Busybox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell(ash)  
Enter 'help' for a list of built-in commands.   

(initramfs) _
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  • 1
    Update to -what-? Did you mean -upgrade-?
    – Rinzwind
    Sep 4, 2017 at 9:57
  • It looks like the computer failed to find the root filesystem. Look at any lines that have /dev/sd<something> or /dev/disk/<something> in them. Also, did you do any partitioning or disk swapping before this happened?
    – Kryštof Píštěk
    Sep 4, 2017 at 11:08
  • You must do a Recovery-mode boot, type blkid to see UUIDs and compare to registered ones at /etc/fstab. Correct them and reboot.
    – Redbob
    Sep 4, 2017 at 12:44
  • 2
    fstab isn't there in /etc.
    – Peborgh
    Sep 5, 2017 at 8:23
  • 1
    If the linked questions, including Accidentally deleted /etc/fstab file, don't enable you to fix this, then please edit this with details of what you did, what you tried that didn't work, and what happened. Your edit will cause the post to be reviewed for possible reopening. Also, if you comment with @EliahKagan I'll see the comment and take a look. I suspect that will fix this for you, though.
    – Eliah Kagan
    Sep 5, 2017 at 23:10

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