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I changed the installation password to (none) after install which works great at boot. Now I cannot install updates because all administrative programs keep asking for a password and will not accept a NULL password nor the original password. Any way to fix this without a new install?

user251501
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1 Answers1

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  1. In GRUB, choose recovery mode.
  2. Drop to root prompt. Use passwd:

$ mount -o rw, remount / $ passwd <username>

Use this to revert back to default password. You can also set any password you want, but that is not advisable as Ubuntu uses the same password for a lot of stuff (like encyption, keyrings...).

So it's better to update passwords via the settings menu, unless you know what you're upto.

xyz
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