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

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2
votes
2answers
36 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 ...
4
votes
2answers
155 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
30 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 ...
0
votes
1answer
31 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 ...
5
votes
1answer
91 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
31 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
34 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 ...
3
votes
1answer
49 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.
0
votes
1answer
22 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
30 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
234 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
108 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.
3
votes
1answer
49 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
68 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
70 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 ...
2
votes
1answer
48 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. ...
0
votes
1answer
28 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 ...
1
vote
4answers
109 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 ...
7
votes
1answer
84 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
1answer
42 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 ...
4
votes
3answers
71 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 ...
1
vote
1answer
98 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
42 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 ...
4
votes
2answers
255 views

How to get the name of the user who executed a bash script as sudo?

I want to create a bash script that must be executed with sudo but should take into account the name of the non sudo user who executed it. So if user bob runs sudo ./myscript.sh I would like ...
2
votes
2answers
150 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 ...
4
votes
2answers
58 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 ...
1
vote
1answer
42 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 ...
11
votes
1answer
425 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
0answers
19 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 ...
2
votes
1answer
571 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 ...
0
votes
0answers
13 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: ...
1
vote
0answers
110 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 ...
1
vote
1answer
130 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 ...
3
votes
1answer
66 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 ...
4
votes
3answers
184 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) ...
3
votes
3answers
276 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 ...
4
votes
0answers
182 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
18 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. ...
1
vote
1answer
220 views

How to copy files as Jenkins “post build” action if i don't have privileges to destination directory

I have the following users "architecture" : root access is disabled. admin user have access only to its home directory. Apache runs as root service (root is the only one that have access to ...
0
votes
5answers
181 views

How can I download all usernames?

I have access to a university's Linux server where all students have accounts. I can retrieve their full name by typing the finger username, and their departments by typing id username. All the ...
0
votes
1answer
57 views

Can't simulate initial login using sudo

$ sudo -iu cyrus sudo: unable to change directory to /srv/cyrus: Permission denied sudo: unable to execute /bin/zsh: Permission denied I don't understand why I would get permission denied for ...
2
votes
2answers
69 views

User created without a password behaves as if he had one

Inside one of my scripts, I created an user based on a directory arrangement on another machine. The thing is that this user, created without a password, behaves just as he had one : he has sudo ...
4
votes
1answer
63 views

How do you give a developer group access to apache, MySQL, php and the webroot?

We have 3 web designers that are currently logging in to our server via root to configure apache and setup websites. I have very basic linux knowledge (I'm a web designer) and have created users and ...
-1
votes
1answer
62 views

How to Always make the ttyUSB0 none root access allowed?

Ubuntu 13.10 64-bit OS. I have a service running using Python serial the application running without root as username. But it has to access /dev/ttyUSB0 , so i need to do every time manually chmod -R ...
1
vote
2answers
53 views

Command to know privileges of a user group

If I run cat /etc/group command or groups username I am able to know the list of groups as group of a particular user. Is there any command through which I could know which type of privileges a ...
0
votes
2answers
66 views

How do I log in as non-interactive user? (e.g. mysql)

I need to run a command mysql_upgrade which, when ran as root, returns Looking for 'mysql' as: mysql Looking for 'mysqlcheck' as: mysqlcheck Running 'mysqlcheck' with connection arguments: ...
0
votes
2answers
393 views

Bash script to remove user

I need to create a Bash script to remove a user. We use RHEL version 4, 5, & 6. Lets say usernames are Ray4 & Ray6 & the script name is deal. Specific tasks for this script are: Does the ...
1
vote
1answer
52 views

user accessing and permission denied

I had a user john in fedora 19 usergroup marygroup useradd -g marygroup mary usermod -a -G marygroup john In John terminal: cd /home/mary Permission denied cd /home ls -l drwx------. 11 john ...
1
vote
0answers
27 views

How to block the user for a certain amount of time

Suppose, I am working in X environment, and I want to have an obligatory periodic rest. Is it possible to setup a root cron job, that will block my user for 5 minutes every 45 minutes? I am using ...
1
vote
0answers
44 views

Disable commands for users [duplicate]

I have users that login automatically via ssh to a script I defined instead of a shell. The script basically launches a program which has a shell-escape in it which would allow the user to execute ...