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

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1
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0answers
12 views

Is it possible to register “virtual” user/group IDs in a Linux system?

Is there a standardized mechanism in Linux which can be used to tie usernames to user IDs without actually creating a system account that can log in? It would seem something like this is possible, ...
0
votes
0answers
17 views

Linux user ssh connection disabled after execution of setfacl command

I have very little linux administration experience, after searching a lot stuff online, finally I decided that I must hope that someone helps. The problem is, I needed to share an account with a ...
20
votes
2answers
45k views

How can I change a user's default group in Linux?

Being new to Linux administration, I'm a little confused about the following commands: useradd usermod groupadd groupmod I've just finished reading the user administration book in the Linux/Unix ...
3
votes
2answers
69 views

What is nobody nobody user and group?

On my server (Synology DS212) some files and folders have nobody nobody users and groups. What are the characteristics of this user and group? Who can write of read this file? How can I change it ? ...
2
votes
1answer
25 views

How to set up users, ownership and permissions across local and remote servers?

I've been learning the Linux OS over the last year or so and I am still very confused on how permissions vary from different configurations. I am trying to set up my local development environment and ...
3
votes
2answers
3k views

Allow user1 to “su - user2” without password

I need to allow user martin to switch to user martin-test without password su - martin-test I think this can be configured in /etc/pam.d/su. There are already some lines in that file which can be ...
3
votes
4answers
3k views

What command should I run after making changes to /etc/passwd file

I have made some changes to /etc/passwd file ,now I wanted to see if the effect of changes taken place or not .What command should I run for that. For example after making change to ...
2
votes
1answer
311 views

With NIS users, how to find out which users are currently logged in?

I'm using a NIS server to control 100 clients. I'm using NIS for centralized authentication and NFS to share the home directory. The main problem I'm facing is that I cannot find out which users are ...
5
votes
2answers
3k views

Another account with same uid as root gets prompted to set new password for root, not itself

After upgrading the os from 5300-06 to 5300-11, this weird behaviour happened. My system had another unix account, let's call it "abc", purposely configured its uid to 0 for working as a root with ...
0
votes
1answer
38 views

Ubuntu 14.04 automatically enters into admin account, how to turn this off?

I am a new user of Linux .I have both window 7 and Ubuntu 14.04 . For my family and friends ,i make Guest account but when i restart my laptop and operates with window7 then options are comes for ...
0
votes
2answers
4k views

vsftp user authentication problems

I configured my ftp user's home dir to /var/www and set a password but I cannot login with ftp 127.0.0.1, it keep giving me 530 Login incorrect. Why is this? I'm sure I have typed the password right. ...
4
votes
3answers
412 views

Restrict user access in linux

I'm creating a new user with the following details: useradd -d /var/www/html/testuser.com -G users testuser I proceed by creating a new password for the user and attempt to login via SSH, I land on ...
5
votes
3answers
8k views

Proper way of changing username in Ubuntu or any linux

I am using Ubuntu 12.04 and made some customization. I will also make it a new iso which is customized ubuntu. What I want to ask is how can I change my username. There are plenty much configuration ...
0
votes
1answer
29 views

Why does transmission adds a new user to the system?

When I installed transmission, I've seen here that I need to change the ownership of some groups to able this to work with my raspberry pi. First of all: why does transmission adds a new user to the ...
0
votes
3answers
66 views

Adding new user in Linux

I created a new user in Linux using useradd connectweb and I see the following in the /etc/passwd file connectweb:x:1002:1002::/home/connectweb:/bin/sh but when I try to navigate to the folder ...
-1
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0answers
16 views

Why, after I've used visudo, do I need to completely logout and back in for the changes to take effect?

I can see this has been asked before, with the answer being that processes inherit the user/group of the parent. This explanation doesn't make sense for the situation where I've done something like ...
6
votes
3answers
11k views

Can I search bash history across all users on a server?

I want to see all bash commands that have been run on a Linux server across multiple user accounts. The specific distribution I'm using is CentOS 5.7. Is there a way to globally search .bash_history ...
0
votes
1answer
57 views

SCP without password prompt using different username [duplicate]

I have 2 servers, Server1 and Server2. On Server1 I have a user named user1. On Server2 I have the user named user2. I need to be able to write a script that runs on Server1, which will scp some ...
1
vote
3answers
43 views

Why is the home directory not created when I create a new user?

I created a new user (testuser) using the useradd command on an Ubuntu server Virtual machine. I would like to create a home directory for the user and also give them root provileges. However, when I ...
0
votes
1answer
9 views

What should file permissions be set to in order for an FTP editor to work?

I installed git on my server and cloned my development repository using the root user. The permissions appeared to have been set to: Files: -rw-r--r-- Directories: drwxr-xr-x I previously had ...
0
votes
1answer
1k views

Add a new user steps for Oracle Linux 5

It's been over 10 years since I last used RedHat (which I believe that Oracle Linux came from). So I cannot remember the steps to create a new user, add them to the appropriate groups, set up their ...
2
votes
1answer
35 views

Are there any user guaranteed to exist on the system

Beside the root (which I guess IS guaranteed), is there any other username guaranteed to exist on Unix system? Linux system? Fixed UIDs for those users? If not guaraneed, are there at least any ...
1
vote
0answers
45 views

Stop all processes by a user: children of supervisord are still running

I'm trying to delete a user but it keeps saying that user is currently used by process ID x I tried everything here and here, nothing works, how do I kill all the process by a certain user in order ...
2
votes
1answer
9k views

Changing user and group ID system wide (including file system attributes)?

(this question possibly related to Linux: simulating/masking user ownership upon mount of 'external' partitions? - Stack Overflow) I typically use Ubuntu (currently 11.04) as my desktop OS; let's say ...
4
votes
3answers
10k views

Restrict FTP user to a directory

Sorry if this is an obvious question, but I don't have a lot of knowledge about this sort of thing, and I've googled for hours, nothing worked. So on a Ubuntu 11.04 server, I want to restrict a user ...
2
votes
3answers
175 views

View list of users

I would like to see how many users are on my system. How could I view a list of all the users on the system?
1
vote
1answer
27 views

$USER not set ssh

On some of my debian wheezy servers there is a global variable $USER that contains the current logged in username and on some this variable is not set immediately at login. How do I set $USER so it ...
3
votes
1answer
49 views

Workstation-like environment across Debian clients

At our university we have a workstation-like system. It's windows XP (or Win-7 on some machines) and you can sit to any computer and log in with your credentials. It seems to be pulling some of your ...
3
votes
0answers
37 views

When running 'su - username', pam_group doesn't add additional groups from /etc/security/group.conf but sshd login does?

I am having trouble determining why su doesn't behave as the PAM configuration would imply. In short, using su to become another user should load secondary groups according to PAM configuration, but ...
0
votes
1answer
299 views

Unable to su into an account: could not open session

in my Linux machine - red-hat I successfully to login to different users as the following su - userC [machine@Linux ~]$ pwd [machine@Linux ~]$ /Users/userC but only in one user I get the ...
2
votes
4answers
62 views

How to find out which package a user belongs to?

In Linux distributions, some packages create user accounts. How can I determine which package created a given user? I want to know specifically for Fedora and Ubuntu, but answers for other ...
8
votes
1answer
574 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 ...
2
votes
4answers
303 views

Moving a directory from a user to another user, keeping the correct permissions

Let's suppose we have to users: alice and bob. Now Bob wants to move Alice's ~/Documents directory into his home folder. What's the best workflow to do that, updating the permissions (from Alice to ...
2
votes
1answer
173 views

gnome “switch user” shortcut or command line

Is it possible to switch user of gnome desktop environment by single command or any shortcut key, in centos 6.0, or Can we create shortcut key? I found "fusa", but still unable to install it.
83
votes
7answers
116k views

How do I remove a user from a group?

Which command should I use to remove a user from a group in Debian? When adding a user to a group, it can be done with: usermod -a -G group user However, I could not find a similar command ...
1
vote
0answers
15 views

How does autoconfig/autodiscover work?

I have a server with OpenLDAP/Kerberos authentication with 7 desktops/clients. Manually generating a new user and configuring a new profile (gnome, evolution mail accounts, evolution calendar/tasks ...
0
votes
1answer
30 views

Sudoers - group managing and reboot/shutdown

I've got a group (let's say name "group1", ID = 1234) and a user (let's say name "user1", ID="4321"). I want to do two things: I want that user to change passwords from other members of that group, ...
2
votes
1answer
41 views

Use current user environment variable in sudoers file

I want some of my users to be able to change their password with sudo command because at the time they log in, they are passwordless (ssh keys connection). My users have no password (and this is ...
0
votes
3answers
48 views

/etc/passwd permissions and GECOS field

The default permissions on Ubuntu (or even some BSD) distributions for the /etc/passwd file are 644. It is pointed out in questions like this that /etc/passwd is a sort of user database and it is ...
0
votes
1answer
10 views

Multiple users' access to directory

I'm running Arch Linux. My website's files are in /home/user/www/ directory. Another users also have their website's files in /home/foo/www/ directories. Now if I want to change something on their ...
1
vote
0answers
18 views

How to create a master user for creating default settings in production programs?

I am interested in creating a master user whose default program settings are inherited by later users, like a template user. I know this used to be done in multiple-user Unix terminal settings such ...
2
votes
2answers
49 views

Limit user from viewing files he doesn't own

Normally, file such as /etc/passwd have the permissions 644 which means that everyone has a right to read the file (4) but only the owner has a right to read it and write to it (4+2=6). I want to ...
1
vote
1answer
29 views

What if I add a user to a supplementary group?

I am using debian 7.0 and I added "debian-transmission" to the group "pi" with: usermod -a -G pi debian-transmission I made this change because transmission was not able to write the pi mounted ...
1
vote
1answer
121 views

nginx - userdir with user permissions

What I want to do is have the usual server running user files like this: http://users.example.com/~user1/stuff.php which would be stored somewhere in /home/user1/www or something like that, but ...
5
votes
1answer
10k views

How do I set the user of php-fpm to be php-user instead of www-data?

I am using php-fpm on debian with nginx for php5 support. I would like to have php-fpm to be under the user&group php-user instead of www-data. I thought the init.d script would have the user ...
2
votes
2answers
116 views

assigning read/write privileges for a folder to a user in CentOS 7

I am logged into a CentOS 7 server as root. I created a folder /somefolder. I want someusername to be able to write to that folder via scp from a remote computer. What command should I run so that ...
6
votes
5answers
12k views

Disable user shell for security reasons

We have several user accounts that we create for automated tasks that require fine-grained permissions, such as file transfer across systems, monitoring, etc. How do we lock down these user accounts ...
1
vote
3answers
4k views

Get environment variable of other user [closed]

Is there a way I can see the environment variable of an other user? I want to do that as root, so permissions won't be a problem I guess. For the user himself, I use echo $PATH or set | grep PATH ...
6
votes
2answers
5k views

Force the owner and group for the contents of a tar file?

I would like to create a tar file with contents belonging to an owner:group pair who do not exist on the system from which the file is being made. Here's the direction I've tried: tar ca ...
2
votes
3answers
201 views

Command for finding users who are not logged in

Is there any command that can find the number of users that are not logged into the system ? I am trying to write a shell script that counts the number of users who are logged in and number of users ...