Ubuntu Security :: Automatic Login With Enforced Screen Lock
Aug 30, 2010
Is there a way to set Linux to automatically log in to a specific user account and at the same time lock the screen? I want to save time and trigger various software that always should start up on boot, while leaving the computer unattended during startup (extra important and practical for remote control boots), by enforcing a 'screen lock' so that no-one can see what happens behind the login screen without entering the login credentials.
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May 9, 2010
i have this problem i cant find how to remove the automatic lock when i left my laptop open i want to change it for 2 hours or remove it all.
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Apr 22, 2010
I recently set up a family computer for a friend, and now his son is "experimenting" with the terminal (randomly entering commands). since he could accidentally do something bad, I am supposed to prevent him from using terminals, but only as hi user. I tried vlock and away, but with vlock it says 'this terminal is not a virtual console', and away can't seem to lock all consoles.
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Mar 3, 2010
A few minutes ago I was using google chrome when suddenly the scroll-lock indicator on my keyboard turned on... I pressed the scroll-lock key, but nothing happened, the light remained. I opened a terminal and ran "top" to find what processes were running when I was automatically logged out. I logged back and checked the logs and found the following entries in my auth.log:
Code:
CRON[2971]: pam_unix(cron:session): session opened for user root by (uid=0)
CRON[2971]: pam_unix(cron:session): session closed for user root
[code]....
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May 25, 2010
I'm trying to lock an account after a number of failed login attempts in a RHEL5.
This is the relevant configuration in /etc/pam.d/system-auth
In the logs I can see how the count of failed logins increase and exceeds my deny option but the account isn't locked
Do I need any other option in the PAM file? Is there any other way to lock an account?
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Jun 8, 2010
I am trying to disable accounts after 5 unsuccessful login attempts. I am following the guidelines in this article:
[URL]
This is on an Oracle Enterprise 5.4 box, which is essentially RHEL 5.4 Here is what my /etc/pam.d/system-auth looks like:
--------
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
[code]....
Unfortunately, the account does not seem to be locked or disabled. As root, runninng 'su test2 -c <some-command>' always sucessfully runs <some-command>, and leaves the failed attempt count at 6. /etc/shadow does not have an * or ! anywhere in the encrypted password for the 'test1' user.
What am I doing wrong? I thought that with the max attempts set to 0 in faillog, that the deny= parameter would be used. I thought I should be using su <user> -c <command> from the root account to test if the disable feature is working.
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Nov 20, 2009
I just installed Fedora 12 earlier today using preupgrade. Everything seems to work alright, but I do have a couple of problems. I've had this happen twice already, but when I'm booting up, my machine will freeze once the Fedora logo is shown right before I get into the login screen. Another problem I've had is when I do boot into KDE I'll see an ! icon next to the clock telling me that there has been a crash in the kernel.
Edit: Update- It only hangs when I reboot. If I restart in windows and try to boot fedora, it hangs, if I restart in Fedora, it will hang after the restart. The only way I can boot Fedora is from a cold boot
Edit: I seemed to have fixed the problem after searching Google for 20 minutes. I just ran this command as root.. #chcon -t system_dbusd_exec_t /bin/dbus-daemon
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Feb 20, 2011
I logged in as root. i want to activate screensaver which required password.
Installation version is RHEL 5 server. I have installed xlockmore-5.28-1.el5.rf.i386.rpm but when i run xlock comand in terminal window, it shows error e.g. libGL warning: 3D driver claims to not support visual 0x5b xlock: symbol lookup error: xlock: undefined symbol: DPMSQueryExtension
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Mar 12, 2010
Is there anyway to make the lock screen password (accesible when clicking the power icon) different from the username password ?Or to lock the screen, with a different, User defined password, seperate to the Default one ?
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Apr 5, 2010
When i log in as root, and try to click the lock screen button, lock screen doesnt work? Is it disabled by default?is there anyway to lock screen when logged in as root
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Jan 7, 2010
As part of making a encrypted private folder i told encfs to encrypt swap space on my pc knowing that this would probably break sleep and hibernation. That said i just turned on ubuntu for 5 mins, had to go away for a bit, when i came back to unlock the screen my password was not being accepted, and another 5 mins later the screen said that my session had timed out-i had to do a cold reboot Does this mean i cant lock the screen anymore?
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Jul 6, 2011
Is there a way to set Linux to automatically log in to a specific user account and at the same time lock the screen? I want to save time and trigger various software that always should start up on boot, while leaving the computer unattended during startup (extra important and practical for remote control boots), by enforcing a 'screen lock' so that no-one can see what happens behind the login screen without entering the login credentials.
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Aug 27, 2010
just migrated to Lucid from Jaunty and noticed that the login startup screen looks more like windoze (shows all authorized users).One of the endearing security checks with Unix was that if you had access to a console you had guess both userid AND password - the system wouldn't tell you which was wrong.I feel that we have lowered security by making the list of authorized users visible on a console. Is there any way to turn it off and force users to enter both userid and password?
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Jan 9, 2011
I have been using fedora 14 .. I have set d sleep timer and lock the window timer to "Never"But when i watch movies on VLC player the screen locks automaticaly after a few minutes ..
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Jan 3, 2010
I have experienced that the button in my main menu "Lock Screen" does nothing, so I can not lock my screen. What could be the problem? Is there any command in terminal what I could write, so I can see is there an error output or something?
I am using Ubuntu 9.10, GNOME.
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May 12, 2010
I've got an HP Netbook with Jaunty installed, and I've got an older Dell laptop running Debian.A friend of mine, on several occasions, has told me that when I left my computers unattended he could do some kind of series of key-strokes, and then a window comes up and he says that he can change the password for my account.I've asked him to show me how he does it, but he never will because he doesn't want me to be able to thwart himIs he lying, or is it for real? if it's for real, how do I go about changing it so that it can't happen anymore?
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Jun 30, 2010
I've had a password on my 10.04 installation since I installed it (when it was released) and since last week it has disappeared. My computer seems to log in automatically. When I check the login screen settings, it is set to "show the screen for choosing who will log in".
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Jul 29, 2009
Is there any way to hide my username in login screen (GDM)? I ask this because in Ubuntu I have seen that you need manually enter your username.
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Jul 4, 2011
is there anyway to automatically disable screen saver whenever I watch video in full screen?
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May 20, 2015
Learning about the ulimit command, I came across something unexpected..
Checking the root account limits:
# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 16382
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
[code]...
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Apr 12, 2011
My last setup (years ago) ran fluxbox so because it was familiar I installed it as a secondary to xfce right off the bat. I download a lot of different stuff because I like to try out all the apps I can find but somewhere I broke something. I can still run fluxbox fine, but nither the Xubuntu nor Xfce sessions will run now. Last thing I remember changing was pulse audio(removed it for an experiment I was trying with jack audio), not sure if it is connected but when I try to login to xfce the screen goes black, flickers a few times then it brings me back to the login screen.
I tried failsafe but everytime I do my monitor gives me a "frequency out of range" error. I tried purging and reinstalling xubuntu desktop and xfce settings but I am thinking its my xorg config. My laptop is a Toshiba satellite M305D-s4830 with ATI Radeon 3100 mobile graphics card and I am running Xubuntu 10.10. Unfortunately I also broke the screen, so right now I am stuck with an external monitor till I get a new one.
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Jul 10, 2011
When I hit Alt+Ctrl+L my system is starting the ScreenSaver but not locking the screen. The keybinding is correctly set. This is happening in only root account but in another user account it works perfect !
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Jul 15, 2010
I'm already aware that you can set automatic login for gdm, which is what i currently have now.
Unfortunately, for some bizarre reason, it doesn't work 100% of the time. I'd say for about every 10 successful auto-logins, I get a case where it just sits at the log-in screen. This is a problem for me because i use it for a specific purpose, and i need Ubuntu to come up as fast as possible, without any user interaction.
So far my only workaround has been to reboot it whenever it does a bad start (where it asks me to log-in) and usually when the PC reboots, it will auto login fine.
I've given up trying to find out why it does that, so i just want the log-in screen gone entirely. I've searched on google and on this site directly, but no one else seems to have this issue.
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Jun 26, 2010
I'm installing Hardy Heron on several old Dell's and donating them to less fortunate folks. Is there a way I can set it to automatically log-in at startup, not require the password?
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Aug 24, 2010
My laptop running Ubuntu 10.04 insists on automatically logging me in without asking for my password. The only thing is, I've disabled auto login and it shouldn't be doing that.
When I first boot up Ubuntu all I have to do is select my username, no password required to log in. I want the login screen to prompt me for my password for better security.
Here are the settings I already have:
System - Administration - Login screenSet to "show the screen for choosing who will log in"
System - Administration - Users and GroupsI am the only user I have an Administrator level account "Don't ask for password on login" is unchecked, i.e. it should ask for my password on login. If I create a new user with the same settings, that user gets asked for its password. But I don't.
Surely this should be enough to disable automatic login.
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Oct 1, 2010
I have enabled automatic login in Lubuntu, and have now added a second user, I want to DISABLE the automatic login, or perhaps change the default login. The usual Ubuntu admin window for this does not appear to be available. Where in the conf files this setting is, and or whether there is a GUI that controls this.
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Feb 23, 2011
recently installed Ubuntu Server 10 everything has set up just fine but the only problem i have is to get ubuntu to login automatically. The main reason for this is because i havent got a monitor connected if for whatever reason the server restarts its hanging at the login screen and i cant login via vnc to the desktop. The furthest ive got is for it to say at the login screen next to the name (user logged in). Any Ideas on how to resolve this? or if it is possible?
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Oct 31, 2010
I have a dual-boot with windows and linux. Sometimes if I reboot from windows into linux, I notice that when X is starting up before the login screen comes up it will flash a screenshot from Windows. Has anyone ever noticed this?
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Jun 15, 2010
I'm looking for an solution to get an automatic authentication and login to my FON hotspot. I did some search on this but I can't find an solution on this. Is there a way to get it work? I'm running on Ubuntu 10.04.
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Jul 5, 2010
I've just installed Ubuntu 10.04 desktop. I've created two user accounts, one for admin purposes and the other for standard users. At boot up, I have the option to pick one of the created accounts or select "automatic login." When I select automatic login, it logs me into the admin account. I've double checked that the "don't ask for password" option is not selected on either account.
The only thing unusual that I did was select the "don't ask for password" option during the install, and then later (after the install was complete) decided that's not what I wanted and unchecked it.
I need to accomplish one of two things. Either change it so the auto login applies to the standard user account, or remove the auto login option from the login screen altogether.
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