Anything related with user accounts and user management on Unix-like systems.

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1
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0answers
35 views

Cannot login to svn server

I have a SVN server on my Raspberry Pi (Raspbian). It has a project under the directory /welcome, I want to add users to it. My users would be admin with password admin and user2 with password ...
2
votes
2answers
103 views

Preserve ownership with rsync and nonexistent user

I have two computers with the same user, me@Home and me@Work. I usually kept their folders synced by bringing Work home (it's a laptop) and rsyncing over LAN. However, now I'm not bringing Work home ...
8
votes
1answer
667 views

Lightweight virtualization on Linux with user isolation

What Linux-on-Linux virtualization technologies provide user isolation? Specifically, I want root in the virtual machine not to have any privilege on the host. This was not the case for LXC, but was ...
4
votes
2answers
189 views

Change user info on the command line

I have made a user in Mint 16 but want to change its first and last name without deleting it and starting from scratch. I know how to do it with a GUI but I want to know the terminal command ...
1
vote
1answer
7k views

switching from user to root and revers (FreeBSD)

I want to make some modification with root and then with my user, in fact I want to install sudo and he give me the error in the first step: cd /usr/ports/security/sudo make install clean ...
3
votes
1answer
73 views

Default files in home dir for each user

I'm using ubuntu server 14.04. I want to add some files and folders by default in each user's home directory, whenever a user account is created.
4
votes
2answers
763 views

Local Account Creation Date

For compliance purposes there is the need to fetch information regarding local (user and non-user) accounts creation date on UNIX machines. Is there any way (even if it's not the most reliable or ...
2
votes
1answer
78 views

Unix Useradd - Audit list of users added to system [duplicate]

I would like to understand how could I pull out a list of users that have been added with certain privileges to a Unix system over a certain period of time. Now, I understand one way to go about ...
7
votes
2answers
828 views

chown removes sticky bit: bug or feature?

Steps to reproduce: germar@host:~$ cd /tmp/ germar@host:/tmp$ touch test && chmod u+s test && ls -la test -rwSr--r-- 1 germar germar 0 Nov 2 20:11 test germar@host:/tmp$ chown ...
2
votes
2answers
327 views

How to open a program as another user inside a logged display?

I'm trying to open netbeans as a different user, but isn't working. I'm running a Kubuntu 12.04 LTS with KDE. And I tried the following: Open a terminal, type su - myotheruser, type the myotheruser ...
0
votes
1answer
43 views

Store passwords of Linux users in plain text - on purpose [duplicate]

I want to reset passwords temporarily to log in as root at least one time to change passwords. I have access to the hard drive and I can run a live distro to gain root access. I did think it would be ...
2
votes
1answer
348 views

Sendmail can't find local users (with uppercase letters)

Sendmail works through sending to a smarthost, but can't find local users. # sendmail -bv LocalUser@myhost.net LocalUser@myhost.net... User unknown # grep LocalUser /var/log/maillog Sep 8 03:48:30 ...
5
votes
1answer
496 views

sudo - impersonating a user

I am trying to use the sudo command and sudoers file correctly so that I can run a command as another user. I have my sudoers file set up as follows: beans ALL = (root,apache) NOPASSWD: ...
3
votes
2answers
69 views

Is it possible to change passwords temporarily?

I have a Linux system with several users. I don't know their passwords, nor do I want to know them. I have to do a batch copy of some of their directories over SSH, with their account and password. ...
0
votes
1answer
246 views

Debian file's permissions for secondary's group of user

I am installing a proftpd server on a debian dedicated server, In order to be able to update some website files in this folder : /var/www/website I have added a new user : my-ftp-user This user's ...
6
votes
3answers
2k views

Can I allow a non-root user to log in when /etc/nologin exists?

Suppose a non-root user with sudo privileges executes a delayed shutdown (shutdown +10 or whatever) and logs out. Then, before the shutdown occurs, he wants to log back in and cancel the shutdown. The ...
0
votes
1answer
33 views

As what user does a command end up executing? [duplicate]

How can I find out as what user a command executes? (I'm running Ubuntu, but I suspect the answer applies to Unix in general). What I'm trying to do is get msmtp running and logging to ...
2
votes
0answers
32 views

How to set up networking on a per-user basis?

I would like to set up access to corporate VPN for just my user account on my computer; not for the other accounts and certainly not for the guest user. To achieve this, I presume, I need to ...
4
votes
4answers
394 views

Log out a user and delete the account

I am having a problem on the server (CentOS 6, Plesk 11.5) where a particular user is using a mass mailer and is blacklisting our IP address. I have tried to delete this user using: /usr/sbin/userdel ...
3
votes
2answers
219 views

Short, simple command to create a group if it doesn't already exist?

What is the cleanest way to modify this command in bash to only run if the group does not exist? groupadd somegroupname A one-liner would be best.
4
votes
1answer
233 views

Restricted ssh remote execution with arguments

I need to enable remote execution of a shell script on a server, but deny all other access. The script is a toggle that accepts a single parameter (on/off/status). This comes close to answering my ...
2
votes
3answers
284 views

adding list of users to multiple groups

I have a shell script which add list of users which is listed in another file lets say users.txt. After that, I want my script to add users to multiple existing groups with condition, one user may ...
2
votes
3answers
1k views

Limited SSH user on Ubuntu 12

I'm running Minecraft on a server. How can I give my friend SSH access just to the minecraft folder (a root folder), the screen command, and some ports?
2
votes
1answer
100 views

How can I investigate what other users are currently logged in?

Since the last few days I get an error message when I try to shut my laptop down: System policy prevents stopping the system when other users are logged in This error message includes a prompt ...
6
votes
2answers
6k views

I added a user to a group, but group permissions on files still have no effect

I changed permissions of a file (chmod g+w testfile) and running ls -l testfile gives: -rwxrwxr-x 1 user1 user1 0 2011-01-24 20:36 testfile I then added a user to that group ("/etc/group" has ...
0
votes
1answer
110 views

Cannot lock group file: already locked

I'm trying to add a group using this command: groupadd somegroup which returns: Cannot lock group file: already locked. I did some research and most of the solutions require removing a lock file ...
2
votes
1answer
58 views

Does root not require a password to log in as a user?

Does root not require a password to log in as a user even though a password has been set for that user? When I am logged in as "root", su user logs me in as "user". There is no prompt for a password. ...
1
vote
4answers
2k views

How to correctly enable sudo for user in Fedora 20

I followed this question in order to enable sudo command for my created user. So I added it into the wheels group and edited the /etc/sudoers file accordingly. But what I don't get about this is when ...
30
votes
4answers
11k views

Is it possible to rename a Unix user account?

I installed Ubuntu on a computer that is now used by somebody else. I renamed the account with her name, but it only changes the fullname, not the user name, which is still displayed in the top right ...
1
vote
1answer
721 views

Create / Edit files in specific folder using different user / group

I want to know if the following scenario is possible. I am a user called www-admin and I am in the group www-admin. I am also a sudoer. I want to have all the files I create in the folder ...
7
votes
1answer
101 views

How can I keep user acccounts consistent accross multiple machines?

I now have a Raspberry Pi which runs Debian Wheezy. I have a couple machines (4 physical, 2 virtual) sitting here and I would like to unify the user accounts on those machines. The machines I run ...
2
votes
5answers
4k views

Changing user while scp

I need to copy file between Linux machines. The problem that the user I use to login (myuser), is different from the user that can access the file. If I just ssh to the machine, I can switch the user ...
2
votes
1answer
50 views

SSH'd into a computer, uptime / who / users report 0 users?

I'm ssh'd into a server. Why doesn't the server report it? # uptime 21:54:28 up 13 days, 3:47, 0 users, load average: 1.18, 1.11, 1.13 # users # who I'm not really sure I understand it ...
20
votes
6answers
12k views

How do you create a user with no password?

In os X it's possible to have users without passwords. If you inspect them with dscl their password show up as *. This is used for system users such as users for databases like mysql, pgsql etc. ...
1
vote
1answer
553 views

NFS file owner(uid) = 4294967294, can't do much with my mount, How do I fix this?

I have a somewhat strange setup going on here, I have Android as the client and it's kernel does not support NFSv4, also my /etc/exports file on the server side has no NFSv4 style entries. I am ...
2
votes
0answers
68 views

Easiest way to sandbox an user

I'd like to sandbox a user so that they can only read files under /media/shared/somefolder. What's the easiest way to accomplish this? Users/groups? ACL? AppArmor? Some context: Plex Media Server is ...
3
votes
2answers
971 views

How can I create a new user but with a home directory that already exists?

Let's say I have a user called panos and he has his home directory located at /home/panos. Then, I create a another user called Tom: adduser Tom It creates a user Tom who has home dir: /home/Tom ...
11
votes
1answer
440 views

How is file owner and group remembered for an external drive?

I formatted an external hard drive with an ext4 partition and subsequently mounted it. So that I could use the new partition, I did: sudo chown me:me /mount/directory to change the file owner and ...
1
vote
1answer
68 views

backup user accounts without giving a home directory to them

I am reinstalling the older Ubuntu machines with the latest RHEL 6.0 in servers. I have /etc/passwd and /etc/group and /etc/shadow file backed up for the list of user accounts that I need to create ...
1
vote
0answers
28 views

Changing pasword for debian live

I have a hooks file, in the hooks folder, that looks like this: echo "root:rootpw" | chpasswd echo "user:userpw" | chpasswd After boot, Debian asks for user and password. When I type user along ...
4
votes
1answer
3k views

What audit log files are created in linux to track a users activities?

One of the machines on our networks was consuming a large amount of Internet bandwidth. However no user was using the system. When I connected to the server using SSH and ran who it showed that a ...
2
votes
0answers
267 views

Add a user for Postgres on Mac

I've had a very difficult time trying to set up a postgres database. I am using Mac OS X 10.9.2. I am using this tutorial: http://tutorials.jumpstartlab.com/topics/environment/environment.html The ...
0
votes
0answers
19 views

getgrent() never terminates in NIS setup

I have an NIS setup on my Linux box (from nsswitch.conf): group: compat nis When iterating over the group entries (using the getgrent() function), the iteration never terminates. For example: ...
3
votes
1answer
83 views

Two users with different permissions on same directory

Is it possible to give two users different permissions on the same directory? I want to use it for ftp: userFull gets R+W and userLim gets only Read, depending on who logs on. Im getting stuck on the ...
2
votes
1answer
812 views

Home Directories and pam.d using LDAP

Background: I'm not too familiar with the ins and outs of pam and LDAP authentication on a configuration side. I've used systems that use pam but I've only worked on applications, not systems ...
4
votes
3answers
250 views

Is it possible to get uid table in Linux?

I'm a student in a university and I can finger and id all users (students etc) through SSH. Here is the id command e147200@beluga:~$ id e201634 uid=22678(e201634) gid=3561(stat_bs) ...
6
votes
1answer
3k views

How can I do NFSv4 UID mapping across systems with UID mismatches?

I am working in a lab with three Ubuntu systems, and I would like to cross-mount some filesystems via NFS. However, while the systems have some of the same usernames, the UIDs and GIDs don't match, ...
3
votes
3answers
1k views

Allow other user to copy the files from my folder?

I am working with Ubuntu and I have a jar file in this folder /export/home/david And I am logged in machineB as david user. Some other user is also logged in that same machine. And I want other user ...
6
votes
0answers
369 views

Is there a tool(!) to list assigned subuid and subgid values for users?

The question is basically in the title. usermod -v (--add-sub-uids) and usermod -w (--add-sub-gids) can be used to manipulate the subuid and subgid ranges for a user account, but there appears to be ...
1
vote
0answers
25 views

Change the HOME of a user during a graphical session

The other day I had the idea to create display manager independent guest session. My basic idea was to change the login shell to a custom program that creates a temporary home on the fly (f.e. ...