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

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3
votes
3answers
14k views

How do I know a specified user's permissions on Linux with root access?

I have root access to my local server. And some days ago my colleague created a user on that server, giving me the uesrname and password. But the user has a minimized permissions. Like the user can't ...
3
votes
3answers
4k views

Whoami: cannot find name for user id 0

When I run whoami it says: whoami: cannot find name for user id 0 My /etc/passwd file looks like this: root::0:0:root:/root:/bin/bash
3
votes
2answers
6k views

How can I have a separate umask for directory or user?

I want a separate umask for a directory or a user. How can I do this? Edit: I am using Debian 6. The reason why I want to do this is, I want all my SFTP users to create files with write on group. ...
3
votes
2answers
8k views

How do I log out of all my active sessions?

For some reason, I have a few open sessions on an SSH server that I don't know about. I assume they're leftovers from when my pipe broke. $ users user1 user2 user3 me me me me Is there a way to log ...
3
votes
3answers
3k views

Reset all groups to default

I recently set up some groups and users on my machine, and now I want to remove all those users and all those groups. Somewhat stupidly, I read on an Ubuntu forum or something like that that it was ...
3
votes
1answer
97 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.
3
votes
1answer
100 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 ...
3
votes
1answer
246 views

Is running programs as another user useful?

After watching a talk by Douglas Crockford on security where he talks about how browsers got the right answer to the question "Who's interest does the program represent?", I wondered if it was ...
3
votes
1answer
832 views

Is there a way to find out how many instances of the root user are logged into a Linux machine?

We have a handful of users that login to our Linux virtual machine as root either through the vSphere client or through SSH and I want to see if there is a way to tell if multiple root users are ...
3
votes
2answers
213 views

Execute command on shared account login

At work our team uses a shared account "appadmin" to administer our application. At login, each one of us sources an "aliasrc" file containing his or her preferences. (aliases, display, prompt, ...). ...
3
votes
1answer
203 views

Duplicate a user, or at least the password

I have some application that needs to create users that have the same password as others. Is there a way to do this without having to edit the /etc/shadow manually? Some sort of command?
3
votes
3answers
64 views

Understanding a couple of points regarding root privileges

I just wanted to confirm my understanding of a couple of things related to root privileges. Is it correct that: The user name "administrator" is not a reserved name with implied privileges, it is ...
3
votes
1answer
122 views

Gives access to root user for a period of time

I want to know if it's possible to give access to root user for one week or a month, for example. It's possible to increase the period of time before the defined period ends? Is it possible to give ...
3
votes
2answers
389 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 ...
3
votes
2answers
1k views

PHP interface to manage linux user accounts

I have a linux web & samba server. I need to give administrators access to manage minor accounts & groups. Is there a secure php web interface that can do this? I don't want to give them shell ...
3
votes
1answer
42 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 ...
3
votes
1answer
831 views

/home/user: change directory failed error

I just installed Arch reading from the Beginners' Guide on the Arch Wiki. Once I rebooted Arch, I logged into root then I added my own personal account: useradd fox then passwd fox and set my password ...
3
votes
2answers
60 views

Why does “logging out” of a session activate a newly added supplementary group? [duplicate]

I asked the following question Added user supplementary group, but 'groups(1)' not showing change earlier today. Now I'd like to know why the answer works. After running adduser user group ...
3
votes
2answers
4k views

New user can't login in Linux Mint

I have created a new user in Linux Mint 12 with these commands: sudo useradd irene sudo passwd irene //Here I entered the password But if I try to login with this user, the screen goes black for a ...
3
votes
1answer
2k views

User logged in by sftp does not show up in `w`

My server is Centos 5. I have a chroot environment set up with the following in my sshd_config Match group sftponly ForceCommand internal-sftp ChrootDirectory %h AllowTcpForwarding no ...
3
votes
2answers
5k views

smbpasswd failed for new Samba install on fresh Ubuntu 11.04

I've installed Samba on a fresh Ubuntu install. I run the command sudo smbpasswd -a someuser New SMB password: Retype new SMB password: Failed to add entry for user someuser. I've read that you ...
3
votes
2answers
861 views

In new users's home directory create sub-directory with a specific group and permissions

Linux will copy the the contents of /etc/skel when a new user is created. I want to have a sub-directory in each user's home directory, MyStevedore. I want this directory to have the owner be the new ...
3
votes
1answer
733 views

Set visible directories for SFTP access?

I am setting up SFTP access to one of my machines running Linux with the Dropbear SSH server. When I SFTP onto the machine remotely, I can see the entire filesystem on it, even if I might not have ...
3
votes
2answers
221 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. ...
3
votes
2answers
3k 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 ...
3
votes
3answers
3k 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 ...
3
votes
1answer
532 views

How to properly setup user/groups/permissions for a web server?

I spent all day figuring this out, but without success, so hopefully I can get some help here: I have Ubuntu 13.10 VPS server with nginx, PHP 5 and MariaDB installed. I created custom system user ...
3
votes
1answer
106 views

New webserver: What all user accounts should I create and permissions to provide for

This is a followup on my question here. I am setting up the first webserver and am fumbling with what user accounts to create and permissions to provide for better security. Below is what I have. ...
3
votes
2answers
183 views

Log in as one user but authenticate as another

This might be a weird question but I wonder if there are possibilities to this. When I'm configuring a system I prefer to be root so that I don't have to sudo everything. However, the root account is ...
3
votes
2answers
985 views

A question about permissions of hierarchical directories

I have some directories, with following permissions: drwxr-xr-x 18 user1 root 4096 Oct 27 11:25 /home/test1/test2 drwxr-xr-x 24 user1 root 4096 Oct 21 08:38 /home/test1 drwxr-xr-x 492 root root 12288 ...
3
votes
2answers
8k views

Will a users password expire if I set the “maxexpired” to “-1”? [maxage not 0] - AIX

So under AIX 6, according to "lsuser" the user has the following settings: maxexpired=-1 maxage=2 So this means that 2 weeks after the last password update of the user the password will expire, but ...
3
votes
2answers
34 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 ...
3
votes
2answers
115 views

How to loop over users?

How can I loop over all users in a shell script? I am writing a shell script to perform cleanup on a system. And if the script is run as root, I want to perform the requested actions in all users' ...
3
votes
1answer
52 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
2answers
229 views

What is the proper solution to a web server trying to write to a directory?

So, I have a box with a "deploy" user. This deploy user owns a code repository and wordpress is running on this box... When wordpress attempts to do something like upload a plugin, it is using the ...
3
votes
2answers
3k views

'mysql' user and group creation, ownership settings

I know what the linux command chown does, I used it to change the ownership or group of a file. If there is a MySQL installation on a Ubuntu machine, I saw some people doing the following thing: ...
3
votes
2answers
1k views

How to trace a process to original user?

Say, on a Solaris server, user1 logs in, switches to someother user, say sruser, using su - and then starts a process of id X. And then another user user2 logs in, switches to sruser the same way and ...
3
votes
0answers
17 views

Where do I put my web services? [closed]

I'm administrating my server since a few year but I'm looking for good practice like: What is the best place web service like my wordpress website files? My etherpad-lite instance? Which user shall ...
3
votes
1answer
171 views

Ubuntu user disappeared from machine

Unsolved mystery - I was given a coworker's Ubuntu 12.04.1 LTS machine and set up my own (sudo/admin) user on there from the command line. I switched to my user (from his sudo/admin user) and ...
3
votes
1answer
228 views

What are the default openSUSE 13.1 user groups?

I just installed openSUSE 13.1, and I can't even start X on boot. I have to switch to another tty and type startx (after I set suid for xorg). On top of this, I can barely do anything without root ...
3
votes
0answers
904 views

recommended procedure to create a user/group during RPM install

after trying hard to search for RPM best practices guides and finding virtually none, to my surprise, I resort to the community - I need to ensure that some users and groups exist after the ...
3
votes
0answers
259 views

Will a account get locked while logging in FTP mode to a remote server whose password has already expired in UNIX

I have a FTP user id to a remote server, the password for which has expired.The account is getting locked if connection is being made in FTP mode to the server with the old(expired) password. Is ...
3
votes
1answer
1k views

How do I add a local user to a box that uses LDAP authenticaiton?

I'm working with a box that uses LDAP for user authentication. However, I need to add a local user to run some services and I don't want non-person users junking up the LDAP directory. Does anyone ...
2
votes
4answers
279 views

Is there a way to show the history of the commands used in the shell?

If my Linux installation has three registered user accounts, is possible to check the history of the commands introduced by each one, and how?
2
votes
4answers
322 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
3answers
169 views

How to determine users connected ssh

I want to see how many users are connected to a PC to see who is gonna see the message when I do for example: echo hello users! | wall
2
votes
6answers
2k views

sort ls output by users

On Linux, is there a way to sort ls output by users? What I try to achieve is something like this: user_a   file1 user_a   file2 user_b   another_file user_c   this_file user_c ...
2
votes
5answers
18k views

What is the command for listing all users who are members of the admin group?

I am looking for the name of the superusers list on Fedora. (On Ubuntu is seems to be "sudo".) I want to add one of the users to the superusers list. The groups command only lists the groups of the ...
2
votes
2answers
301 views

using chown in linux

I want to assign www-data user full rights in folder /var/www/ and all of the files inside this folder. I have tried chown www-data /var/www/
2
votes
2answers
2k views

How to get hashed password in /etc/shadow using getpwnam()?

Apparently there is a function (getpwnam) that given a username, will return the appropriate entry in /etc/passwd with the other details for that user (shell, uid, gid, etc.). However, I have no idea ...