Ubuntu :: Prime User Suddenly Removed From Admin Group?
Mar 10, 2011
Twice today, and several times recently, I have had a sudo command rejected with the dreaded message "<user> is not in the sudoers file..." It's because my user -- which is the main user, the one you create on Ubuntu installation -- has "fallen out of" the admin group. I can fix it because there are other users defined which are still in the admin group and I can su to one of them and add myself back.But why is it happening? I'm doing software development, and use sudo mainly to do benign things like copying new versions of Perl programs into the application library: I'm not going anywhere near the security subsystem, for instance. I'm worried that one day whatever-it-is will choose to drop all the users out of admin and then I'll have to resort to live CD hacking to fix it.
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Sep 23, 2010
I made a mistake on my friend's Ubuntu system when trying to get hard drive permissions right. I wanted to add a user to a certain group with usermod -G, but without realising I should also use -a, with the result that the user is now not longer in the sudo group. This is the only (regular) user on the system, which means I can not sudo usermod again to get it right. So what to do? The only solution I can think of is using a live disc to restore the group belongings, but I want to know if there's a quicker way. Also, I don't know what more groups the user was in. Is there a history? Or else, what are the default groups?
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Jun 15, 2010
I'm trying to edit a "xl2tpd.conf" file but it always says I have no write permission tried to add my account to admin group but it says something about not able to lock on password try later.
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Apr 9, 2010
i've got a regular user i want to turn into admin group so he can have same privileges as a root. should i just change the GID in /etc/passwd and /etc/group or should i use usermod/groupmod?
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Jul 19, 2011
How can I create a user group that restricts Internet privileges to only members in the group, then I will assigns certain applications to join the group for access to the Internet.
For example, I want only group net to have access to the Internet. Group net is then connected to:
Code:
So far, I am using the gnome group policy manager that is standard with ubuntu but Its not working. It is possible that im misdirected and that I should use a firewall instead?
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May 1, 2010
After freshly installing Lucid Lynx and tinkering for some time to get everything just how I like it, I managed to somehow remove myself and all other users from all groups. Now, obviously, I've restarted and I don't have root privileges as I am no longer a member of admin group. So I am somewhat stuck. I've looked at this page: [URL]. But annoyingly, there is no grub menu appearing on boot up (unlike previous Ubuntu versions). So I'm appealing for your help to either:
a) Show me how I can bring up the grub menu so I can access ubuntu in safe mode
b) Show me another way of accessing the system with root privileges. (Would using chroot from the Live CD work? I just thought of that now so I'll try it).
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Mar 9, 2010
i added users to the group om PDC after it i shared folder on linux server and given permission for users from this group, the folder is showed correct. After it i removed users from group, but the folder is accessible. Where is mistake?
[global]
workgroup = STSCOMPANY
password server = *
[code]....
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Jan 6, 2010
Original HOWTO can be found at: [URL]... So the other day I was in IRC and someone had brought up a problem where they created a new Administrative user, but didnt have rights to use sudo. Looked into the problem a little bit to figure out what was wrong, and it turns out that when you create a new user through the user manager (in kubuntu, anyways. Havent tested in Gnome.) the user gets added to the adm group, however, a quick look at the sudoers file shows that its looking for users in the admin group to allow the use of sudo. So, to solve the problem we do the following: If youre on the new admin user (which Im assuming you are) use the following commands:
Code:
su [insert username of old account without brackets]
sudo usermod -G admin [username of new admin account without brackets]
exit
Then simply logout, and then log back in (not always necessary, but the easiest way to flush the permissions.)
Code:
su [insert username of old account without brackets]
Means were going to Switch User to the old admin account
Code:
sudo usermod -G admin [username of new admin account without brackets]
This simply adds the admin group to the secondary group list for the new user
Code:
exit
Pretty self explanatory
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Sep 3, 2010
This netbook only has a user with non-administrative privs on it and root user but I do not have root's password.Is there a way that I can create a new administrative user of change the current user's group so that it can do sudo commands or have more privs?
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May 3, 2010
Is it possible to allow a group/user to execute a command, where one of the parameters of the command is a group as well? example that does not work as intended:
Code:
Cmnd_alias SU=/bin/su -l %group1 This example works sortof, it treats the "%group1" literally. I know I can list out the "/bin/su -l <eachuser>", but as you can imagine that is impractical. In this example, I want people in group2(not shown for brevity sake) to be able to su to someone in group1
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Feb 6, 2010
I'm installing a new laptop for a friend of mine and he wants 3 user accounts, similair to how he runs his windows setup.
1, an admin account, we have called this account peacemaker.
2. his account
3. an account for his girlfriend.
The problem we have is that if we want to do anything from the terminal that requires elevated priviledges, sudo does not accept his password or that of peacemakers. we have done sudo -i -u peacemaker but it still doesn't accept either password, stating his account is not in the sudoers list.
I'm not a massive expert here, but research brought me to this page:[URL]... But that then just means his account has admin rights, which is what we were trying to avoid. We wanted a setup similair to windows where if you want to run someting with elevated privledges if pops up asking for the admin password. This works in the gui, but not in the terminal.
So in short, my question is, is there anyway of having the terminal accept peacemakers user rights from the his normal user account? If I add the account to the sudoers list like it suggests, does this again just give his account the prilvedges rather than saying supply me with the password for peacemaker.
this is probably not really needed and he can just have his account as the main user, but coming from a windows background, he would prefer the 3 user accounts model (2 normal users, 1 admin)
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Sep 2, 2010
how would i make an existing user on kubuntu 8.10 an administrator with root access?
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Jan 22, 2011
After finally getting Ubuntu 10.10 PPC up and working on my Mac Cube with low capability graphics, I noticed that when I try to run the "User and Groups" from the Administration menu, the program looks like it is starting but then never actually displays.. It shows up at the bottom of the running programs bar and then disappears. Well after having to completely re-install Ubuntu PPC 10.10 and installing all of the updates, User and group Administration still isn't working.. another app that would let me add my wife to my G4 Cube so she could use it?
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Aug 9, 2011
I had two accounts. One was an admin and I set the other as an admin as well, but left it without a password since I wanted the new user to enter it themselves. I went into the new admin account and deleted the old, passworded one.
However, this new account doesn't have a password that I explicitly defined on it. How do I change that? The account is the only one and still 'disabled'.
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Sep 14, 2010
A regular (non admin) user can create a Truecrypt 7.0a file, but it can't be mounted. The admin password is refused. If you try the regular user password, the error is that you are not on the sudo list.
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Jul 16, 2009
I'm having a bit of a problem after joining Ubuntu 9.04 to my company's Windows Domain. I can log in and use sudo just fine but I don't have access to certain things in my menu (i.e. "Add/Remove Software") and I can't open the User Manager. I manually edited the /etc/group file as root and added my username (username@domain) to the appropriate groups but still no luck.
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Feb 7, 2016
I made the mistake of using the command 'adduser' on an already existing user. I was incrementing a name and mis-typed. Now the account refuses to recognize the users password. The user can get in.
I tried resetting the password as administrator (passwd 'user'), but when the user tries, the new password isn't recognized.
I tried expiring the account password (passwd -e user). The user gets prompted for a new password, but the new password still doesn't get recognized.
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Dec 4, 2009
how to make a admnistrator account and change normal user role admin role i want to modify file system
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Jan 7, 2010
I just tried to change a user account by changing its name, password, and home directory. But first I had created a new account with the new name, pass, home directory. I tried to log into the new account but got a dead account. Nothing came up, and it didn't allow anything, complaining about "can't create Nautilus," and other such error messages.
Tried to go into the Constantine login screen and put in "root" and the original password. "Invalid Use..." Tried "root" with the new pass. "Invalid..." So what can I do at this point to get in and create a nice, clean, new account (with admin privs) for the new user?!
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May 6, 2011
i have centos5.3 i want to create user with non admin privileges he is unable to see contents of server only he will able to login nothing else
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Jan 9, 2010
I managed without knowing to remove my user from the sudo users group. I did usermod -G fuse <username> and now I can't sudo anymore. How do I get back to the promised land?
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May 7, 2010
I recently ran into a situation where the ftp user account suddenly could not login. I used the User and Groups system tool to check the user account and reset the password. I then attempted to use ftp and login with the new password and still could not. I then went to check the permissions on the folder and found that the system partition was full, so using gpartd I was able to resize the system partition.
However this still did not fix the ftp login problem. When I opened the User and Groups tool again, all users,including my main account, except root are no longer displayed and all groups are not showing. If I try to add the original ftpuser account I get the message that the user already exists. And my main account works for login still. If I add a new user, it is not displayed in the list either.
If I do a cat /etc/passwd I see all the users listed including the new one I created and cat /etc/group displays all the groups and everything looks like the users are still associated with the correct groups. I can use passwd to change the account password without error and I can use adduser to add another user. Howerver no users are listed in the User and Groups tool and users still can not login to ftp. I can reinstall proftp if needed but I would like to be able to use the User and Groups tool to administer users again.
PS: Forgot that just before encountering the ftp login problem, Update Manager and some updates listed that I attempted to install but got an error and didn't have time to check why. Now I know that the partition was full.
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Apr 20, 2011
First off, since this seems like a networking issue I put it here, but if it should be somewhere else, the powers that be should definitely move it over.
I'm using Ubuntu 10.10 on Dell Presario M2000 I have made sure that all updates have been done.
As the subject states, the admin account (mine which I'm posting to the forum with right now) can access the internet and see webpages. The user account on this laptop (my underaged sister who my parents don't want full access to the computer) will not access any webpages, it just continually looks like its loading.
I have made sure the wireless card drivers are installed and activated.
Also, I ran iwconfig and ifconfig and here are their results
p { margin-bottom: 0.08in; } Results of iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"myqwest4137"
[Code]....
These were both run from the user account. At this point it looks like its connecting to the internet through the wireless card as I was also able to run the update manager through the user account and have it download the updates (after putting in my admin password of course).
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Jul 14, 2011
I have created a new user using sudo adduser "user1" from the root .but this user does not have full admin rights...How to give full access to this user1?
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Jan 31, 2010
I recently had a problem with one and only one user on an Ubuntu 9.10 desktop system.
[URL]
The user who installed Ubuntu eventually could not log into the desktop (Gnome) without getting a small X-term appearing in the upper left-hand corner of the screen. I have since fixed the problem by reinstalling and using frequent logouts and reboots to see if the original problem could be re-created.
Other users, most of whom were also admin who could use sudo and were created after the installing user, could log into Gnome just fine. The installing user was fully deleted and re-created (home directory) and not installed with its backed up information. This still did not fix the problem.
My question is this. What could be left behind and possibly in which files by the installing user that would still affect this user even after that user was completely removed and re-created?
The only thing I have not done on the re-installation, is I have not installed Konqueror. I have installed konsole, which installs some KDE components, and that was done the first time.
I don't want to install Konqueror and have the same problem occur again at least without a place to look, so I don't have to re-install. I did make the classic mistake of not looking in the logs, specifically xsession errors. I won't make that mistake again.
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Feb 21, 2011
i am relatively new to ubuntu. Just recenty i have not been able to access certain files(for example the history and bookmarks in the firefox folder), download files individually from the internet(music,fonts,etc), recieving an error message
Quote: Originally Posted by firefox error console
Error: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIFileOutputStream.init]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: file:///usr/lib/firefox-3.6.13/components/nsSessionStore.js :: sss_writeFile :: line 2944" data: no][code]...
i have sudo priveleges and can install via update manager. i read somewhere that compizfusion might affect access permissions and i do use compiz and emerald at the same time.
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May 7, 2015
I'm using Debian Jessie Cinnamon right now. I've got 1 user account on my machine--fred--as well as root, of course. "fred" is an administrator, and many times that is enough for root priviledges, for example, I can install packages via apt or dpkg. However, I cannot access "Users and Groups", or install packages via GDebi, with my password. For that, I have to have the root password.
I know that it is possible to let the admin account handle everything and not even need root--for example, Mint and (I believe) Ubuntu do it this way. I don't know how, though.
Code: Select allgroups fred
fred : fred cdrom floppy sudo audio dip video plugdev netdev lpadmin scanner bluetooth
I did disable the root account by Code: Select allsudo passwd -l root to see if it would make any change. Nothing different happened except that I now can't use GDebi or access "Users and Groups" since the root account and therefore password is inactivated. Not a big deal to get it back, though.
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Feb 19, 2010
The biggest problem for me is user management and passwords.
Till know my email server use passwords from system users /etc/passwd. I would like to have a server where user which doesnt have an access to console can change the password in webmail panel (RoundCube, SquirrelMail)
Do You have any suggestions ? Or maybe You know some complete systems with nice admin and user panel ?
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Jan 8, 2011
One of the feature in my application involve changing of hardware setting. This require the user to be root or have administrative right.Before my application enable that feature, I want it to check whether the user is "root" or not, or whether user use "sudo" command to run the application or not, or whether the user has administrative rights or not.What are the codes or library that can do this?
NOTE: Sometimes, advanced linux user may set the user id of root to something else other than 0. So, getuid() may not be helpful in this case.
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Jun 13, 2010
What would be the effect of setting ProFTPd's user and group to the same user and group that Apache use? Are there any security risks in doing this, or is this safe to do?
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