Since I updated Ubuntu, I am not able to go to login screen. It just keeps on loading but it never goes to the login screen. I logged in using Ctrl+Alt+F1. I typed username and password then this message popped up - "this ubuntu 12.04 system is past its end of life and is no longer receiving security updates. To protect the integrity of this system, it is critical that you enable extended security maintenance updates." followed by a link to ubuntu.com. I just want to login.
44583
I just did a do-release-upgrade going from Ubuntu 16.04 to 17.04. However, now when I login via SSH I have the following message   Welcome to Ubuntu 17.04 (GNU/Linux 4.10.0-20-generic x86_64)   * Documentation:  https://help.ubuntu.com  * Management:     https://landscape.canonical.com  * Support:        https://ubuntu.com/advantage  Ubuntu 12.04 LTS end-of-life was April 28, 2017 -- Upgrade your Precise systems!  $ sudo do-release-upgrade -m server  0 packages can be updated. 0 updates are security updates.   My question is, how can I remove the   Ubuntu 12.04 LTS end-of-life was April 28, 2017 -- Upgrade your Precise systems!  $ sudo do-release-upgrade -m server   it wasn't there prior the release-upgrade  I checked and I am on Zesty  lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:    Ubuntu 17.04 Release:    17.04 Codename:   zesty   My question is not, how can I remove this message, this I found. My question is more, is there a reason why this appears after a release-upgrade? Is this message something generic not taking into consideration the current version of Ubuntu? Or maybe my system is not updated properly?
84960
I'm uing ubuntu 12.04 desktop. I have 3 users: user1(administrator), user2(standard) and guest. I wanted to disable user1 and enable user2 which auto logs on with no password but after I did that I can't login to user1 and user2 accounts except the guest session user. I'm striped off every administrative privileges. I don't know which options are available to me and how do I enable root or user which is an administrator?
63549
When I first installed Ubuntu I choose NOT to ask me for a password at login. That was ok for that moment cause it didn't ask me any password at login. But now I want to be asked for a login password. I changed the settings to Not start automatically but it doesn't work. My Ubuntu doesn't ask me password at login. What should I do now?  In the automatic login box (in the user accounts setting window) I have it checked to off (0 or Off), the thing is that my LightDM login screen gives me only a "Start Session" button below my user name, instead of the usual password field.
21852
My system was just updated with linux image 3.19.31. When it was rebooted, the system hang at the login screen and did nothing.  How can I remove this image? It has a major bug in it.
78439
I have installed 12.04 LTS but surprisingly not able to login as root. I have unlock and set the password for root but while login i can not see 'other' option in GUI login where i can put root id and password.  please help me.
43416
A few months ago I set full disk encryption during installation of Ubuntu 17.10. Now, I've decided to upgrade. The upgrade ran to the end without any problems. However, after reboot I am not able to log into my encrypted disk.  Where can be the problem? I am 100% sure I press the "right keys" on the keyboard, but technically I don't know what I am writing because of "*" characters and maybe after upgrade my keyboard layout changed. I use some characters which might be somewhere else on the keyboard. What language is default after upgrade?   By the way, I've already tried Caps-lock, but still no luck.  Help will be really appreciated. I am not a fan of installing my system and all backups over and over again.
79636
I had to reinstall recently. I installed normal Ubuntu 14.04. I then installed gnome/gnome shell/gdm. I then logged in my user to gnome. Since then I have been configuring my system.  Yesterday, unlock was working fine. Today, the automatic lock screen is not accepting my password as valid. It just takes the input like it's processing it, then takes me right back to the same password prompt. If I click the 'login as a new user' link, it takes me right back to the lock screen. Ctrl+Alt+F1, etc, does nothing.  I had to resort to a hard boot. I've tried this more then once. (first time was from automatic, idle time lock, second time was from my triggering the lock screen with the keyboard command).  I'm certain I have my password right, as I am able to get logged in after the cold boot.
82027
I was attempting to update my 11.10 install to 12.04beta. During the install step, I accidentally lost power to my laptop (the power cable came unplugged) and it shut down. Whenever I go to boot now, I can select my install via Grub and it loads up to where the sign-in should happen, but I get a display that looks like what you see as soon as you shut down. It looks like it locks after checking for the battery.   Is there anyway, with or without Live media, to restore my machine's install/update to 12.04 but still keep my settings/applications/files?
50925
While installing the Ubuntu 20.04 updates during upgrade from 19.10 to 20.04, my screen suddenly went completely white and displayed a message saying  Please logout and try again.  But I could not locate my cursor and so I switched off my laptop. After restarting it again, it was showing an error message saying  Please update the microcode  Why did this happen? How can I solve this problem?
86791
So i installed Ubuntu 18.10 fresh install and i did have the normal new login screen of ubuntu gdm3. Ive been downloading gnome themes and i noticed after i did everything(idk if its from installing new themes) when locking the computer i still get the normal lock screen  And when i slide it up i get the stamdart login screen:   Lock screen  Login screen    But now it gets weird when i click on "Log in as another user" i get a new different type of log in screen, which comes when booting into ubuntu after the logo loading screen too(on this login screen the tap-to-click also doesnt work!):   2nd login screen    EDIT: Im sorry i forgot to add a question  - What is this(is this normal?) and how to set it back to default?  Added theme:  Named "flat remix"   I would be happy for your help Thanks Best Regards!
62458
I want to login as root, but when I enter   sudo -s   and enter password, this message is shown: "you are not in sudoers file", and when I enter   su   and enter password, this is shown: "authentication failure".  My os has one account only. about past1 hours ago I log on as root and do some commands , when I logout , I can't login another time!
119559
how can I reset a lost administrative password ,considering that Ubuntu and windows7 are both installed on the computer , considering also that "Boot up the machine,and after the BIOS screen, hold down the left Shift key." didn't logged me to any thing, just continue the loading of the system as normal??
76219
solution doesn't work. I'm using Guest account right now.  I was just working on VirtualBox and listening to some music with Rhythmbox when suddenly my computer became laggy, and seconds later, everything disappeared except my cursor and wallpaper. I ran terminal using CTRL+ALT+T and typed startx, sudo startx, and the last one sudo shutdown -h now. After booting up my computer again I could not login to my user account, after typing my password and hitting enter, black screen for 2 seconds, and login screen again.
94931
How do I know my username? I've installed Ubuntu, but I don't know my username, only my password. I can't access my laptop and it can't be opened.
42371
This didn't start out as a problem with the login loop.  I was attempting a clean install of Ubuntu 16 and using the new feature that allows it to detect proprietary drivers for me.  I started off with   When I attempted to use the recommended Nvidia Drivers, it caused the laptop to become unstable and freeze.    I attempted the remedy from that post and it resulted in a login loop.  I have attempted   sudo mv ~/.config/dconf/user ~/.config/dconf/user.old   Tried   sudo mv ~/.Xauthority ~/.Xauthority.backup sudo service lightdm restart   I have tried locating and disabling secureboot, but there is no secureboot option in the bios.  This is an HP DV2000 series laptop.  Nothing is helping    Can someone help?  edit:  Guest session does the same loop.  /var/log/Xorg.0.log shows a lot of stuff, but I took a pic of what seems relevant   Thing is the driver I first tried that started this mess was 304 drivers and the 364 drivers were supposed to be the fix according to other posts.  More editing:  I purged the nvidia files and it came back to a blank desktop w/o the interfaces so I right clicked and restored a backup.. The sidebar came back and it was running gallium.  I restarted and its the blank purple screen again.  I am thinking of just reinstalling and not using nvidia drivers.  The software center is telling me I have a presario and i should use 304 drivers.  Its not a presario. =(  At least the software center provides a suggestion for the coprocessor driver which is nice.
43750
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.
88193
I have just updated my system from 15.10 to 16.04 via sudo do-release-upgrade. During this process, it displayed a screen with the following message:  Your system has UEFI Secure Boot enabled. UEFI Secure Boot is not compatible with the use of third-party drivers. (...) Ubuntu will still be able to boot on your system but these third-party drivers will not be available for your hardware. Disable UEFI Secure Boot? (yes | no)  Since the only third-party drivers that I am using are the NVIDIA graphics drivers, and since they have been working fine with Ubuntu 15.10 and Secure Boot enabled, I chose the &quot;no&quot; option here. I don't see why I should disable this for no good reason, and I assumed I can just reinstall the third-party driver via the system settings GUI after the update. Alas, no. Upon reboot, my login screen appeared in very low resolution. When trying to log in it immediately throws me back to the login screen. I have tried the following to fix the situation: sudo apt-get purge nvidia* sudo reboot  This leads to a purple screen and no reaction to Ctrl-Alt-F1. Logging in via SSH, I then did: sudo apt-get install nvidia-current sudo reboot  which again brings me the former scenario, with a very low-res login screen, and no way to log on. This is a pretty bad upgrade experience. Did anyone else have this, and what can I do to fix this? (while keeping UEFI Secure Boot enabled) Thanks.