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

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1
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1answer
511 views

Reverse id command, I want the User/Group Name from the uid or gid

I know some uid and gids that I dont know who they belong to and they are not in /etc/passwd (could be LDAP or from another system). How do I get Id info from only uid or gid preferably without using ...
0
votes
2answers
768 views

Samba shares - Cannot access with users

I have installed a Samba server on Ubuntu Server 12.04 so I can store files there from my desktop or laptop or whatever. /etc/samba/smb.conf: #======================= Global Settings ...
4
votes
2answers
220 views

How to control the time that users spend on

I need a solution that allows me to control the time that each user spend on the computer, excluding idle time (some kind of parental control). I've tried timekpr, but it doesn't work on Ubuntu 13.10. ...
1
vote
5answers
623 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 an user.Once we do not put a password we can directly log in to the ...
6
votes
1answer
157 views

How do daemons work?

If a user wants to execute a command, he has to first log in into a system. But some users in the system have /bin/false or /sbin/nologin set as a default shell in the /etc/password file. If I change ...
1
vote
1answer
401 views

The other users: avahi, root, syslog, messagebus,, nobody, ntp, rtkit and whoopsie

What are all these other users (found them with top) when running Ubuntu: avahi, root, syslog, messagebus, nobody, ntp, rtkit and whoopsie. I am aware that whoopsie, for example, is for reporting ...
1
vote
1answer
503 views

How do I change login shell to nologin for an LDAP user RHEL 6?

yum install ypchsh and yum install ldapmodify both don't find a package. I only want to change the shell for certain ldap users on this one server. Someone please help, I can't seem to figure this ...
0
votes
2answers
57 views

Local mail delivery not working

We are using RHEL 6.1 server. We need to send a mail from server to local domain (tcs.com). we are using mail command for this purpose. [bsoauser@hsluabsoa ~]$ echo "hi" | mail -s "test" ...
3
votes
2answers
469 views

Listing users and usergroups in Raspbian

It surprised me no search has led me to a such simple question like this one. All I want is to get a list of users and usergroups (whatever the second thing actually is). I've found many text about ...
2
votes
2answers
3k views

How to change file owner in AIX?

How can I change a owner of a file in AIX? I created a file using my personal account and then I tried to change user for this file: chown rootuser myfile.csv chown: myfile.csv: Operation not ...
2
votes
2answers
92 views

Configure external HDD for use with multiple linux PCs

I've got an external drive, and I'd like to have a linux partition on it. I formatted everything correctly on one machine with Fedora20 (I have one ntfs and one ext4 partition), but when I plug it in ...
3
votes
1answer
306 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 ...
0
votes
1answer
162 views

Why can my gentoo systemd installation only execute files as root?

If I try to login as any other user, via su it says 'permission denied'. If I use su -l it says 'canot cd to /home/<user>'. Logging in via the tty just kicks anyone without a message out except ...
0
votes
1answer
153 views

How to make a Torrent client keep the same torrent data for multiple users?

I'm running Linux Mint with two user accounts. One account has admin priviliges while another is a normal account. If I start a torrent download in admin account I want that to continue even in the ...
5
votes
1answer
292 views

Whta does '\+::::::/bin/bash' in /etc/passwd mean?

Found the line \+::::::/bin/bash in my /etc/passwd, which looks strange to me. What does that mean? Has my computer been hacked?
3
votes
1answer
78 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 ...
12
votes
11answers
1k views

Concern about logging in as root overrated?

For personal linux on my personal notebooks, I've usually set my environment to autologin as root even under X or lower runlevels. I've found my workflow is very pleasant and fast, without any ...
1
vote
1answer
287 views

Granting permission for all users in a group to write to a directory and all its subdirectories

Trying out Linode for the first time, running an Arch Linux image, I successfully installed nginx as root. This, however, made /usr/share/nginx/html inaccessible to non-root users. Intuitively, I ...
1
vote
2answers
166 views

How to determine what user was used to start Apache Tomcat last (or last few times)

On a Mac, or a Linux Tomcat install, how do I determine what user was used last to start Tomcat? Is there information in the logs somewhere to that effect? Assume that startup.sh and shutdown.sh are ...
1
vote
4answers
829 views

Is it possible to “hide” an account from /etc/passwd?

A typical Linux system has not only accounts for the actual user(s) of the system, but also various system accounts. Is there any file like /etc/passwd for daemons, or other means resources where an ...
3
votes
2answers
208 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
1answer
57 views

Restrict emails to system users in postfix?

I am running postfix, and it seems it is willing to accept emails for system users, such as man, sshd, daemon, www-data, ... Is desirable (probably not)? and what I can do to disable this?
2
votes
2answers
3k views

su - user doesn't work for users without a password

I've created a user on CentOS with useradd -M username. Now, I want to become that user just like su - username. It asks me for a password for that user but I didn't set a password for that user. As ...
0
votes
3answers
200 views

Owner of init and xterm

I don't understand what is owner of process. Owner of bash is me. Then who is owner of init and xterm? I searched on google but I can't find.
2
votes
2answers
89 views

Changing username still leaves old traces

I changed my username about a month ago, and although I have forgotten the specificities of how I had done so, I'm pretty sure I followed the instructions on the Arch Wiki. Since then, some programs, ...
5
votes
2answers
252 views

Create a computer lab using Linux [closed]

I would like to know, how I can create my own Linux lab, like the universities Linux labs. I mean OK, I can install for example Fedora to all my 4 PCs, but how I can login from different computers, ...
0
votes
3answers
150 views

How to restrict one user files to another user

On my machine there are user accounts. My question is how to restrict access to ones user files. Meaning no one else can access my files at all. How can I setup this restriction? How many root users ...
2
votes
2answers
120 views

Convert numeric string from file to exit code in shell

I'd like to grep /etc/password for a username and return the last two digits of a user-id number as the return code. This is because I have an application whose main way of interacting with other ...
6
votes
3answers
150 views

Passwords for newly created users?

I am fairly new to Linux and I have question regarding users. When I use the useradd command I don't specify a password. I must use the passwd command afterwards. Does this mean that the user is ...
4
votes
3answers
197 views

restrict student account permissions, give faculty access

I have set up two user groups, students and faculty on Ubuntu 12.04 and created a number of students and faculty accounts. The problem is a student can currently see & read all of the files of a ...
1
vote
2answers
122 views

Wrong number of logged in users using “w”

There was a temporary network glitch and all user terminal ssh sessions were broken. Upon logging in to the CentOS server again and running the "w" command lists a higher number of users logged in ...
2
votes
1answer
172 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 ...
2
votes
3answers
933 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 ...
0
votes
2answers
209 views

How to change user name

I somehow changed my prompt (PS1) from [mpatil@localhost ~]$ to bash-4.1$. I also have changed my user mpatil's home directory from /home/mpatil to /home/algo. Now some applications are not working ...
1
vote
3answers
51 views

How to find from what computer I connected to a current server

I often work on one of available to me Linux/HP-UX servers (let's say it is server1) and then do ssh server2 ((let's say it is server2)) and start working on another Linux/HP-UX server. Then I can ...
10
votes
4answers
2k views

What are the dangers of creating a normal user with UID < 500?

What are the dangers of creating a normal user with UID < 500? Assuming the UID's are not duplicates of existing UID's, what could go wrong? This is not something that I want to do, but something ...
1
vote
1answer
53 views

deleted user is still an option in gnome login in Debian 6

I'm running Debian 6.0.8. I misnamed the original username I wanted, so I made a new user with the proper username. On the gnome log on screen, I see two users of the same name (the login screen ...
1
vote
3answers
907 views

Setting default username and group for files in directory

Using this helpful post I am able to set a default group and file permissions in a folder. I'm having trouble setting a default owner (teamlead uid 1234). setfacl -d -m g::rwx /my/test/folder ...
0
votes
4answers
4k views

New user with root access in Linux Debian

I've created a new user by using "User Accounts" in "System Settings". How do I grant rights so that this new user can have the same level of access as root?
1
vote
1answer
84 views

Shell Script for collecting user login dates

I'm having trouble making a shell script that will make a list of all the dates when users log in. I want the most recent entries to be on the top (because I know if you just use date >> ...
2
votes
1answer
2k 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 ...
9
votes
1answer
3k 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. ...
1
vote
2answers
265 views

talkd doesn't print a message

I wanted to use talk with my brother (we both have Debian jessie). So i installed inetutils-inetd, inetutils-talk, and inetutils-talkd. Now i wanted to try wether it works. So i created a testuser ...
5
votes
1answer
604 views

How do I sftp to a server if the username contains @ symbol

I have to sftp to a server to a specific port but the username contains the @ symbol. suppose the user is "user@domain.com" and the ftp server is just "domain.com" I will end with sftp -oPort:8777 ...
1
vote
1answer
31 views

How to check where users come from? [duplicate]

w command displays useful information about where users come from and what are they doing. A example of its output is: ~ $ w -V procps version 3.2.8 ~ $ w 13:53:14 up 164 days, 3:12, 5 users, ...
2
votes
1answer
68 views

Why do I see myself twice when I run the who command? [duplicate]

When I run who on my ubuntu laptop I see myself listed twice. Once with pts/0 and once with pts/2. Why is that?
1
vote
4answers
4k views

What type of permissions should a user's home directory and files have?

I'm working with a fresh install of Ubuntu 12.04 and I've just added a new user: useradd -m testuser I thought that the -m flag to create a home directory for users was pretty standard, but now ...
3
votes
2answers
49 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 ...
2
votes
1answer
286 views

how can we know which pts in /dev/pts mapping to which ip address?

Can anyone explain , how can we detect which ssh session belong to which ip address using /dev/pts directory ?
0
votes
1answer
198 views

Added user supplementary group, but 'groups(1)' not showing change [duplicate]

I'm trying to add myself to the fuse user group but it doesn't look like the change is taking effect even though /etc/group looks correct after invoking addgroup or usermod. I've tried both ... sudo ...