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

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-2
votes
1answer
286 views

Changing normal user uid to 0 to normal uid

I have given a normal user root permissions on Linux by using this command: usermod -u 0 -o username How can I go back and make the user a normal user again? ex: # grep Jack /etc/passwd Jack ...
1
vote
2answers
89 views

Lock a user with his home folder

Is there any way of making a user only able to see and modificate his home folder? I am currently on arch linux. Just explaining a little better, the user would not be able to see /etc or any other ...
8
votes
4answers
29k 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
2answers
278 views

What user should I create and execute cron jobs as? Apache? Root? Me?

I'm setting up a new Webserver and having trouble getting cron to execute as expected. I am using a script to create cron jobs in .tmp/crontab.txt, which is then moved to /var/spool/cron under the ...
-1
votes
2answers
182 views

Passwordless login (physical console and “su - user”)

How to configure an user (in debian) to login without password ? An user without password shall login in text console and using su - user without being asked for password. (secure isn't a requirement ...
0
votes
0answers
28 views

sftp user with appropriate permission

I'm new to linux user permissions and having trouble configuring a user. So the scenario is, I have apache installed on centos. I've a virtual host with document root at /var/www/sitename/public_html ...
0
votes
0answers
63 views

How to Duplicate user?

I'm in Cloud 9 IDE, and I want to clone the default user for better collaboration. I know it's not just a simple copy of the /home/<username> folder from Archlinux wiki, which tells me about ...
2
votes
1answer
272 views

Checking how long a user has been logged in

Is it possible to check for how long a user has been logged in? Or when the user logged in on an Unix/Linux system? I logged in as another user on my system a while ago and I would like to now how ...
5
votes
3answers
18k 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 ...
8
votes
2answers
14k views

Running chsh does not change shell

I want to change my shell from bash to zsh. I have tried running the following while logged in as user zol: $ chsh -s /bin/zsh $ sudo chsh -s /bin/zsh zol $ su -c 'chsh -s /bin/zsh zol' # The above ...
0
votes
1answer
49 views

Where do service permissions come from

I'm trying to broaden my knowledge of the events surrounding system startup. I see that there are many process which are started without root level permissions. e.g. rsyslogd is listed as running ...
1
vote
1answer
559 views

usermod always reports user does not exist on RHEL 6.6

My RHEL 6.6 VM is running behind Centrify Active Directory. When I do sudo id 'any_existing_user' it will give back info about that user. But when I do sudo usermod -c 'Comments' ...
2
votes
2answers
1k views

Create guest account with restricted access to applications

I'm trying to create a guest account in arch linux that only allows the user to use simple applications like firefox. I do not want them to have access to programs like terminal or grub-customizer ...
13
votes
1answer
7k views

In /etc/group what is the meaning of the second field?

A sample /etc/group file contains the following entries: root:*:0: adm:!:4:logcheck antoine:x:1000: The man pages I've read (Debian & OSX) says the second field is to store a group password. ...
2
votes
2answers
249 views

Can I log in into a system user after I create him?

On an Ubuntu machine, if I run the following command: adduser --system --no-create-home system-user I create a system user named system-user without home directory with /bin/false as the shell. This ...
27
votes
3answers
13k views

How can I determine if someone's SSH key contains an empty passphrase?

Some of my Linux & FreeBSD systems have dozens of users. Staff will use these "ssh gateway" nodes to SSH into other internal servers. We're concerned that some of these people use an unencrypted ...
2
votes
1answer
800 views

User created with different UID and GID

I'm creating a new user in my system, by calling: sudo useradd -m -G nas -s /bin/bash alf which supposedly should create a new user with the same UID and GID. However the passwd file is appended ...
1
vote
1answer
56 views

How to find userID after login as root using pmksh?

I am trying to gather the username of the actual person logged in the server instead of just showing root. After entering pmksh, the prompt changes to root@hostname. When I do echo $USER the result ...
1
vote
1answer
748 views

Linux/Unix username length limit

Would it be difficult to increase the limit or would it just be a one-place change? I have a system that could really elegantly make use of the Unix multiuser model for process isolation but I'd need ...
0
votes
0answers
251 views

Using CentOS as a thin client

I have about 50 desktop PCs running CentOS. These will be used as "thin clients" for users to access their real desktops (VMs) using some flavor of NX technology. So, the PC on the user's desk is a ...
1
vote
2answers
34 views

User verification

Suppose I've writen a setuid root executable and I want it to verify that the user is not a script by asking the user to provide his/her password (granted, users might save their password and use that ...
1
vote
3answers
29 views

Set up a user for a program

/etc/passwd shows many "virtual" users that are essentially for programs to use, rather than for people. How do I go about setting up such a user? All I need is a user that isn't used for anything ...
2
votes
3answers
6k views

Allow paswordless user to change to another passwordless user

I have two users dev and tomcat neither of them have a password. How can I allow dev 1 do su - tomcat without having him having to enter any credentials? 1 connects with ssh keyfile
2
votes
5answers
16k views

Is there some default password for a new user in Linux?

I am a Windows user gradually moving towards Linux. In Windows we have an option of either having or not having some password for a user. Once we do not put a password we can directly log in to the ...
1
vote
2answers
66 views

The Deny the permission of mounting any drives to a user

I'm using Linux Mint 17.2 Cinnamon. There are multiple partitions on /dev/sda. /dev/sda1 is where the system resides, /dev/sda2, ..., /dev/sdaX are NTFS partitions. There are two users admin and ...
10
votes
4answers
2k views

what does star in passwd file mean?

I have a computer that I need to boot into, but the passwords seem to be bogus. Additionally i cant mount the drive for writing, and it is a mips processor, so I cant stick it in another machine to ...
1
vote
2answers
5k views

Disable operations outside user's home directory with chroot jail?

I'm trying to restrict a user to a specific directory called gclegal using a chroot jail. I've uncommented the line in the /etc/vsftpd.conf file chroot_local_user=YES Created a new user called kg: ...
1
vote
1answer
41 views

Restricting CPU time of processes by executable path

Is there a way to restrict CPU time (duration) for all processes which are invoked by executables that are located in a certain directory? I would like to be able to auto-kill all applications which ...
0
votes
1answer
45 views

A specific user can't login (after connecting TV), can't figure out why

I have lately installed Debian Jessie on my Dell XPS (1401x, GPU is NVIDIA 425M), installed the NVIDIA driver, and everything worked well. This evening I connected my laptop to my TV via HDMI (not ...
1
vote
2answers
86 views

2 passwords for login

On Linux, I would like to to set up a user account in such a way that the user would have to enter 2 passwords to log in. Is this possible, and what would be the implications of this?
1
vote
1answer
72 views

Apache Tomcat and Httpd - Sharing common web publication folder - CentOS

Suppose: The Httpd's Web publication folder is assigned according: Edit /usr/local/httpd/conf/httpd.conf file: DocumentRoot "/usr/local/WebFiles/Html" <Directory ...
0
votes
0answers
21 views

vfat mount only seen by 'root'

For the sake of this question, I'll assume the device /dev/disk/by-name/device formatted as vfat, the mount point /mount/point and the user named pancakes with uid 1000. As root, I attempted to mount ...
0
votes
0answers
23 views

A puppet configuration style for users

I want to set a configuration managment utility for users, like puppet but for users, I need to install one package or another or apply one manifest (in puppet) in order of the user that is logged in ...
1
vote
1answer
110 views

Unable to login as a newly created user

I have a dual boot Kali Linux along with windows 7. Now when I installed Kali it logs me in as root. I do not have a login in my name. So I created a user with the following steps. However when I ...
6
votes
3answers
20k views

How to create an unprivileged user in CentOS?

I want to create an unprivileged user to run my RhodeCode server and Celery daemon on a CentOS instance. I think the accepted definition of this is no home directory, login disabled, and no shell ...
3
votes
3answers
4k 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
1answer
82 views

How does file system permission behave on different systems sharing an NFS export?

I'm familiar with how Linux permissions work on a single machine, but what happens when a directory is shared (specifically via NFS)? Also, what happens when two users are seemingly the same (same ...
3
votes
1answer
243 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 ...
6
votes
1answer
5k views

Keep same file owner for newly created files

This question is regarding samba file access. I have created a folder A, and under folder A created two folders B and C. And also created three users A, B and C. User A has access to all three ...
13
votes
3answers
464 views

Unexpected Bash completion of ~ on OS X

I pressed ~TabTab on the bash command prompt and got an unexpected set of completions. First it looked like all the folks in the /Users directory, and a lot more. Then I thought it was doing the ...
-2
votes
6answers
17k views

How to change to normal user in the command line when logged in as the root user? [duplicate]

I log into an system as root via ssh. How do I become the normal user or another user in the command-line?
0
votes
0answers
223 views

Unable to delete a user: user test is currently used by process xxx

I'm trying to delete a user: pgrep -u test ps -fp $(pgrep -u test) killall -KILL -u test userdel -r test But the last command always returns userdel: user test is currently used by process xxx ...
2
votes
1answer
58 views

Why does the `users` command return different users depending on whether I ssh or open a new terminal?

How does users define what users are logged in? If I ssh into a box twice, I see my username twice listed if I execute users. However, if I create a new login shell via sudo su -, I do not see root ...
1
vote
2answers
84 views

How to get rsync to complain if user not found

I'm moving files over from my old server to my new server. By the time I'm doing it for real (as opposed to just testing) I'll have all the "user" users (the non-system users, i.e. >= 1000) created on ...
1
vote
2answers
91 views

Running program using X while different user logged in with gnome shell

My situation is I am logged in to gnome with a user, and through the terminal I am trying to run steam as a different user with the error unable to open a connection to X. Both users can run steam ...
1
vote
0answers
34 views

Is it allowed to assign one range of subordinate IDs to two different users?

Is it allowed to assign the same range of subordinate user and group IDs to different users on the system defining the subordinate IDs? Please provide sources for your answer. The idea here would ...
0
votes
1answer
92 views

list users who are all created by current user in linux

I have set of users with root access.I want to know list of users who are all created by currently logged in user. From below structure if user1 login to system , how to list user's like ...
3
votes
2answers
154 views

How to update user/group settings of a running process?

Suppose I change some user settings like its initial login group or add it to a new group. I now can do su user and work with these new settings. But all the previously running processes will still ...
0
votes
0answers
223 views

How to Sync UNIX Passwords SAMBA4.x?

My current server is running Debian 8 jessie with Samba 4. Its purpose will be to host a simple file sharing server for around 100 people on Windows machines. I already have a collection of UNIX users ...
2
votes
2answers
370 views

Getting Group Names for List of Users

I have a text files with a list of users formatted like: name1 name2 name3 ... Calling the command groups gives the primary group name for that user. ex: bash$ groups name1 name1: ...