Questions about managing the UNIX users, groups and permissions.

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0
votes
1answer
6 views

Remove a domain user account from local workstation, not from AD Domain

I have an AD Domain run by Samba4 and have successfully joined Ubuntu workstations to that domain and able to add users and log into the workstation with domain accounts. Now, I am needing to remove ...
6
votes
1answer
282 views

In which directories can “nobody” user write?

In which directories can the nobody user write in a standard, out-of-the-box Ubuntu distribution? I already know about /tmp which is drwxrwxrwt, but are there any other places by default where any ...
1
vote
0answers
16 views

How can I login into a domain user account or login as other user in Kubuntu?

I do have a kubuntu box connected to our Windows AD DC, and now i want to login one domain user in my AD to my kubuntu box but I cannot find a way to log as other user in the login screen. I tried to ...
0
votes
0answers
8 views

Gnome-User-Group manager in xfce is read only

I installed xfce4, it works fine. When launching an application from the menu or icon from desktop it has default user rights. Some tools, like the gnome-user-manger and synaptic, needs root rights ...
1
vote
0answers
27 views

New System account created automatically [closed]

This is weird. Last night, I started to download a movie from a torrent site, and I fell asleep. When I woke up, the download was finished and There is another user account created in my system named ...
0
votes
1answer
19 views

How to make postgresql user access file system?

I am trying Postgresql for learning. I installed that from repository. by default user named postgres had created. I want to know that how can I make this user access files in the disk? I tried ...
-1
votes
0answers
13 views

How could hide a user from log in screen? /etc/lightdm/user.conf doesn't work!

I created a user from this command useradd -M -N -g sambashare share And i want to hide it from log in screen, and i followed How do I hide a particular user from the LightDM login screen?. ...
-1
votes
0answers
41 views

Can't set or change user password on ubuntu?

I can successfully set a password by terminal using "passwd" command , and it works good , when using "sudo" commands , when installing software . but i can't lock screen , and i can't log out of the ...
0
votes
0answers
39 views

adding and deleting users problem

I have a problem with users this problem is that I can't add or delete them. When I try to add or delete them I have those logs: I searched it on the internet and I found that these problems are ...
0
votes
0answers
23 views

How do I map webmin users to system users? Can webmin user use as a linux user?

How do I convert the webmin user(for example, admin) to linux user, with entries in /etc/passwd or /etc/shadow? I am trying to map webmin users to linux users for login. Webmin user has same access ...
17
votes
1answer
607 views

“Admin” user automatically has sudo privileges

I added a user named "admin" to my Ubuntu 14.04LTS server, using adduser. I'm used to having to add a user to the /etc/sudoers file when adding a new user that needs sudo privileges, but this time I ...
0
votes
1answer
37 views

How to create users having different access privileges?

I want to create 3 users. First user have only the read only permission, that is this user can read all file but can not write, delete and edit file? The second user is execute only user can not see ...
1
vote
1answer
37 views

Can the root user change the owner of a file that he doesn't own?

My web server uses the user www-data to access/change files. This causes permission issues for php file upload etc. for files owned by root (or by any other user). I'd like to use the 755/644 ...
-1
votes
1answer
27 views

I can't create a group for my users how do i do it?

How do i create a group for users i have already created on Ubuntu? I have tried several things but it won't work.
0
votes
0answers
148 views

DB2 Express-C Administration Server installation error

It's my first time trying out DB2 but I ran into a problem when I tried reinstalling V10.5 of DB2 Express-C on Ubuntu 14.04 (had to install then uninstall). It installed smoothly the first time, but ...
0
votes
0answers
33 views

How to change root directory for sftp user in ubuntu

Hi I would like to allow a client access to the server via filezilla with SFTP. I have the username, home directory and group set up. This currently brings them to their home directory with ...
2
votes
1answer
157 views

Not able to create user on Ubuntu 14.04 (32 bit)

I'm sorry this post is so long, but I wanted to make sure that all the stuff that might be relevant was readily available. I've been trying to create a new user account on my laptop, and, even though ...
0
votes
1answer
71 views

Add user with users-admin

I can't seem to get the users-admin command to work properly under Ubuntu 14.04.1 LTS. When I open it, everything looks fine, but pressing the Add button does nothing, no reaction at all. At a ...
2
votes
1answer
49 views

Remote workstation management [closed]

Some of my family members asked me to install Ubuntu on their laptops (because I just refuse to do anything windows related anymore), but helping them over the phone can be a pain. Is there some kind ...
2
votes
1answer
30 views

How do I delete a duplicate group using the group id?

I am using ubuntu 14.04 with MATE desktop. By mistake I created a group called dba two times with different ids: 1001 and 502 I want delete the group dba with id 1001. How can I do this?
1
vote
1answer
216 views

What does it mean when `ls` shows a numeric user id?

I'm fairly new to the ubuntu system. We have an Ubuntu server where we host our WordPress sites, and I have seen a lot of 1002 users when I do the ls -lh command inside a directory, like: -rw-rw-r-- ...
0
votes
1answer
24 views

shared user accounts across workstations

I run a small academic research group and we have 4 workstations and one server, all running Ubuntu. I would like to have login credentials that are shared across all workstations and the server, so I ...
1
vote
2answers
91 views

Renaming user name

I made a mistake in the username at the time of installation. So I changed the name of the user after logging in by creating a guest account with SUDO rights. But when I checked the list of users ...
1
vote
2answers
33 views

How can I see the list of users..?

I'm fresh to Linux , to be precise this is the first day I'm sitting before Ubuntu OS. I added users for a learning purpose & now I want to see all the users in the system. How do I see the users ...
0
votes
2answers
86 views

Ubuntu 14.04 userdel -f does not remove user

I faced with small difference in behavior of userdel utility on Ubuntu 10.04 and 14.04 and now struggling trying to fix it. I have kind of "hardening" script which should remove user via userdel ...
0
votes
3answers
161 views

How to remove a newly created user in Ubuntu 14.04

I added a user just for learning purpose how to add user using the command sudo useradd usernamefollowed by my password, the user is created successfully. Now I don't want it and running the command ...
10
votes
2answers
391 views

Is it possible to store user's home directories remotely?

I work in a small office with 6 PCs and a server. I'm looking at installing Ubuntu on all of the computers, but I'd like users to be able to log in to any one of the computers and be able to access ...
1
vote
1answer
38 views

Cannot edit group-owned files as user belonging to that group

I'm running an Ubuntu 14.04.1 LTS server on Digital Ocean. I'm trying to make it so I can edit files in /srv/www from my normal user account, without needing to be root. Currently, /srv/www is owned ...
1
vote
1answer
86 views

Uninstalling hadoop on Ubuntu 14.04, files/directories left over

I'm trying to completely uninstall Hadoop on my Ubuntu partition (14.04 Trusty Tahr) and am running into an issue I haven't seen before. I completely removed the directory that hadoop was installed to ...
1
vote
2answers
694 views

ubuntu 14.10 create new user password change button disabled

I did a fresh install of ubuntu 14.10 (AMD64) to my desktop this evening. Everything works fine as in the versions before. Now I started to create some more users. I can only activate them if I choose ...
0
votes
0answers
20 views

Ubuntu not booting up after user name change

I have ubuntu installed (dual boot with windows 7) on my system. It was working fine. Then I just wanted to change the username. So I googled and ran the commands given there. The list of command that ...
1
vote
1answer
65 views

a specific user can't mount usb sticks

I have the problem that a specific user can't use usb sticks any more. they are not mounted automatically any more. For some weird reason I changed the numeric userid and groupid of this user ...
0
votes
1answer
56 views

14:04: Usergroup / file permissions problems daemon proces

I'm trying to understand the file permissions in ubuntu, but after reading some material, I still don't understand why the following situation doesn't work: I have a folder ...
0
votes
0answers
77 views

How to add Jenkins to Apache Group?

I currently run an instance of Ubuntu 14.04 LTS. Apache2 is installed Jenkins is installed (along with the Jenkins linux user) The problem I have, is that my custom site is in ...
0
votes
1answer
79 views

Ubuntu 14.04 doesn't load after upgrade

I upgraded my Ubuntu from 12.04 to 14.04 and now it keep loading and never boots. sometimes the login page appears and after entering the correct password the page simply splashes and nothing ...
1
vote
3answers
82 views

How do you limit root to no more than 1 login at a time?

I took a practice test for a cert and one of the questions was "Limit root to no more 2 simultaneous logins, make this configuration persistent between restarts". I didn't even really know this was ...
0
votes
1answer
27 views

2nd harddrive, /var/lib/mysql ownder is nvidia-persistenced when mounted, mysql when booted?

I have a second HDD that was my old OS. When I boot it the /var/lib/mysql folder is mysql:mysql but when I mount it (LVM) in my new OS it is nvidia-persistenced:vboxusers. I want to do a cp -pr to ...
5
votes
2answers
467 views

Cannot add a new user

I am trying to add a new user to my ubuntu 14.04 os. I go System Settings -> User Accounts and try to click the [+] button, but nothing happens it is grayed out. The system did not ask me for ...
1
vote
1answer
30 views

How to remove unused or outdated folders?

I administrate a multi-user system that has had quite a lot of user turnover. The users who have left us still have a folder in the folder /home. I would like to remove the folders for the users that ...
0
votes
0answers
22 views

Can't alternate users, need to logoff to login other on ubuntu

I installed from scratch the Ubuntu 14.04 and configured it with a Samba share. There is a windows share RAID 1 drive (2 x 1 TB) with Mdadm, that Dropbox and more 2 backup solutions access (Acronis ...
7
votes
2answers
1k views

How can I allow a user to edit a specific system file normally restricted to root?

I am trying to write to /etc/network/interfaces with a user that does not have root privileges. The reason for wanting to write to this would be to allow the user to set a static IP since I am ...
0
votes
1answer
109 views

Setting up multiple Ubuntu computers to share files and users

I'm very new to the *nix world and only vaguely have heard of things like YP/NIS, LDAP, Kerberos, etc. If I have several machines that I want to toss Ubuntu on to and share users and files/mounts ...
1
vote
1answer
33 views

Setting up new user allowed actions

I made a new user but have been trying to research how to limit their ability to make changes to the system. I am basically looking for them to having the ability to change ifconfig settings. Beyond ...
1
vote
1answer
72 views

What is an easy way to add new user

I have read about the command sudo adduser newuser and sudo passwd -l but if I understood correct I have to grant every thing by terminal. I created easily a new user by Systems>User Accounts but it ...
0
votes
0answers
30 views

How uid and gid related to permission?

I want to know how uid and gid is related to permissions/owership? Is there any default/permanent id for root? what are standard values for uid and gid?
1
vote
2answers
80 views

Prevent a user using sudo [duplicate]

Can we restrict a user and do not let him to go to the root mode. For example, when he inter sudo su, The system tells him you can not access the root?
0
votes
1answer
60 views

Limiting file access for a huge number of users

The ubuntu is really great for it's user management, every service can use it's own system user: but should I use it for distribution? Let's say I have a service, that I host, with many customers who ...
4
votes
3answers
438 views

Why my newly created account is asking for a pasword if I didn't set one?

I tried to create a new user account from 'User Accounts' in the System Settings. First I pressed the Unlock button and the + button. Then I chose Standard account type and filled account name. ...
2
votes
3answers
1k views

How to know whether am the administrator of my Ubuntu?

Is there a way to know whether am the administrator of my Ubuntu 14.04 ? If not, how can I became the administrator ?
48
votes
7answers
8k views

Why is 777 assigned to chmod to permit everything on a file?

I was asked in an interview why it is that 777 is assigned to take all permissions for a file. Why not 555? He said that there is reason for everything. So, what is the reason for 777? Why not any ...