Getting "a start job is running for dev-disk-by..."

Getting "a start job is running for dev-disk-by.."

followed by a 90 second delay during each boot.

This occurred to me once when I repartitioned my hard drive and relocated my swap file.

This is caused by an incorrect UUID entry on your /etc/fstab file because it is still referring to the old swap.

To fix this, you have to check the correct UUID that you're currently using:

$ sudo blkid

Now open your fstab file and inspect any difference in values and replace them with the correct one accordingly.

$ sudo gedit /etc/fstab

After editing the file, go ahead and save it then reboot your computer.

Hope this helps!