I've upgraded my ubuntu from 16.10 to 17.04. After system restart I'm not able to login with the original password. Any Idea what should I do now?  Below is the screenshot -
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I've upgraded my desktop from Ubuntu version 16.10 to 17.04.  When I try to login I'm not able to login. See .  I did Ctrl + Alt + F1 and able to log in through terminal.  After logging in via terminal, I'm not able to connect to Ubuntu sites:    But looks like I'm able to connect to google:    Third related question I posted:
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I have set a root password when installing the Kali linux and now I have forgotten it.I even don't remember my user name.I have searched through the internet and I have found a method that includes editing the GRUB menu, which doesn't seem to work with the Kali linux version that I have now.What do I do to reset my root password?
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We need to fill in our password every time for logging in, installing new software, even for unlocking the the password manager (Is think it the only annoying thing about using Ubuntu).  But when Ubuntu ask for updates we can press "Install Updates" and everything installs without filling in a password.  Is this a bug? Or just the way how Ubuntu works?
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I deleted two unused user accounts. Now I am unable to login even into my own account. I rebooted in recovery mode in the root shell and tried to restore the back-up of /etc/passwd. However, the filesystem is read-only!  I can only access root shell via recovery.  Can you help me?
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There's been one problem I've had since I installed Ubuntu to run alongside Windows, I assume this would also be the same if it was installed to replace the other operating system as well, the installer prompts you to create a password upon typing in the user account name and if you don't put in a password and just put in the user account name, it ends up saying to create a password. My comparison is in Windows and Mac OS X, you are never forced to create a password.  If you remove the password on your Admin account in System Settings > User Accounts, you won't be able to authenticate whenever you try to install something, because it requests for a password and putting in no password at all isn't going to work, it will just act as if you put in an invalid password. This is what I call "getting locked out of privileges".  I'm finding the "Authenticate" window that comes up whenever you install something or accessing somewhere a nuisance, 'cause it always requests for your password.  So my question is - Why does Ubuntu force users to create a password upon installation?
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I recently upgraded to 12.04 from 11.10 and since upgrading have been unable to log in to my user profile. The upgrade went okay and I can login to a guest session fine but whenever I try to login to my profile, after entering my password, I just return to the login screen.  I've changed my password in Root (passwd &lt;username&gt;) and can log in to tty1 with no issues, it's just in GUI I'm having problems.  I'm using a HP dv7 laptop, 32-bit Ubuntu install, Intel® Core™2 Duo CPU P7350 @ 2.00GHz × 2, Nvidia graphics.  Any help would be appreciated.
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While upgrading to 14.04 using sudo do-release-upgrade my network connection was interrupted and several packages failed to upgrade.  Running do-release-upgrade again reported No new releases found but apt-get listed many packages "kept back", so it seemed the system was in an intermediate state. I ran apt-get dist-upgrade which installed those packages again, then apt-get autoremove after which apt seemed happy.  However, after restarting I cannot log in at the GUI prompt. After entering my password the error "Failed to start session" appears in red. I am still able to log in from the command prompt, but I don't know what to do to solve or debug the GUI log in failure.
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I changed my default shell from bash to zsh and after rebooting, I am stuck in a loop where it brings me back to the login prompt after my password is entered correctly - cannot log into root either.   Because I am at the login prompt I am unable to edit anything so will need a live usb, but not sure what else to do/how to go about fixing the issue  EDIT: As requested, I log into tty1 which is there by default, I enter in my username and password as usual but when I do this it displays some text too quickly to read then goes back to the same prompt for my username again. Usually it would take me into a terminal after that where I would start xfce with startxfce4 command  To change the shell I did chsh /bin/zsh  I may have also run it as sudo, however I did this yesterday and can no longer recall if I did this or not.
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Did a fresh install of Ubuntu 17.10 a few days ago on my Lenovo Thinkpad Edge (using an existing home directory on a different partition).  When I close the lid and put it to sleep, on waking it I can no longer login. Sometimes it spends ages checking the password, then says the password is wrong. Sometimes I can't even enter anything into the password box. To fix this I have to shut down and restart. Login always works fine on a restart.  Any help?
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I've had a lot of problems lately and now I'm having problems logging in at the login screen. I'm giving up and just want to reset and start over. How can I "factory reset" Ubuntu, in this situation, or, for future reference, in general?
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When I install Ubuntu, it never shows an option to set a password, yet there is a password when trying to log in to the admin account and when I try to install packages. I can't change the password in Root because when I try to it says "Authentication manipulation token error". When I try to fix the shadow password thing in root it says access denied.
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I lost my password to a VM running 11.04, but have ssh access via public key authentication.  Is there any way I can reset the password without a reboot? (This is to avoid downtime of services it's running.)
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I just installed Ubuntu 16.04 LTS along with the packages php, mariadb and nginx. I ran mysql_secure_installation and changed the root password.  Now when I try to login to mysql using the root account while logged in Ubuntu as normal user account I get access denied.   When I login using sudo mysql, mysql doesn't even ask me password. If I run mysql_secure_installtion I see that old settings never got set permanently.   What am I doing wrong?
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If I attempt to change my password to nothing by opening "User Accounts", the "Change" button remains greyed out:    How do I change my password to be empty? I know you can set Ubuntu to automatically log you in, but I want my password to be empty, I never want to type in a password to authenticate myself as that user.  I know that there are reasons why this might not be a good idea, but I want to know if it is even possible. I'm using Ubuntu 12.10.
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I forgot my Ubuntu password so I booted into recovery and dropped into a root shell prompt and this is what happened:  root@username-PC:~# passwd username Enter new UNIX password: Retype new UNIX password: passwd: Authentication token manipulation error passwd: password unchanged
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I am having problems with the su command. I know my password and I am typing it correctly but su indicates authentication failure.  So I checked on the internet and then went into recovery mode and changed my username's password to what I was entering before.  Even now entering the same password on su gives me authentication failure.  Please suggest what am I doing wrong??
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I was running Ubuntu 17.10 on my mac (mid-2010) as a dual-boot with Refind as the boot manager. It was functional albeit non-optimal drivers for wifi and video card.  A day ago, the Software Updater app gave me the option to upgrade and I took it. It completed the install and clean up fully but I was unable to do a final restart due to power issues. Anyway, after the power issues were sorted out, I booted my laptop, only to find that it wouldn't boot into the OS and would get stuck in a loop at a screen which was filled with lines of code that made no sense to me.  So, I rebooted with option key and booted into recovery mode and ran check disk and fix broken packages and then resumed boot. Then it booted into the OS fine. I rebooted again, and then it went back to the screen with lots of lines of code which no sense. I tried the same thing again with the recovery mode again. And this time when it booted I picked the proprietary Nvidia drivers. Now when I boot, there is just a blank screen and I cant boot into recovery mode either because there is an error in EFI screen option.  So I boot into OS X and download the ISO file for 18.04 and make a bootable USB stick and boot into that from the EFI screen. Now, it boots and once past the orangeish blue bionic beaver wallpapers, it gets stuck in a loop at a message called setting locale.  So, at this point, I can neither boot into my HDD Ubuntu install nor into the Live Disk.  My next plan of action is to try and get an ISO of a previous version and try booting form that. I'd like to avoid that if possible and stick to 18.04.  EDIT 1: I flashed Ubuntu 17.10 onto the USB storage, and that boots fine. I'll try 18.04 once again. Also, I'm using Unetbootin for flashing the USB storage.  EDIT 2: This keeps cycling over and over when I live booted from a freshly downloaded copy of Ubuntu 18.04 ISO file flashed in to a USB:    Keep in mind that when I do this on the same USB with the ISO file for 17.10.1, live boots perfectly fine.   EDIT 3: I've given up. I'm doing a clean install of 17.10.