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

learn more… | top users | synonyms

3
votes
2answers
207 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
56 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
172 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
88 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
241 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
145 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
111 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
145 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
182 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
119 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
150 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
722 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
173 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
50 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
51 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
700 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
3k 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
77 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 ...
8
votes
1answer
2k 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
235 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
476 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
63 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
48 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
246 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
187 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 ...
1
vote
2answers
5k 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 ...
4
votes
2answers
254 views

How do I execute a command on login for a system user with no home folder and no personal .bashrc file?

I set these users' home folders through the /etc/passwd file, but when they log in I would like them to activate a python virtualenv. If they had a personal .bashrc file, I'd just include the activate ...
2
votes
1answer
51 views

How do I set a newly created user account to NOT prompt the user to change their password?

I created a new user account, but the user is prompted to change their password on first login. I don't want them to change their password, I want them to use the password they were assigned. How do ...
1
vote
1answer
103 views

Linux statistics script (Google analytics-like)

We own a few servers, each with about 100 users on it, some with 1 domain, some with a few. I'm looking for a script which runs in the background which can provide information about which users uses ...
3
votes
1answer
94 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. ...
1
vote
1answer
31 views

permission on a user I added locally

I added a user to my Mint (Ubuntu) Desktop so that he could ftp files that I can share – I am peter he is john, so we have /home/peter and /home/john. I want to have full permissions on his home ...
1
vote
0answers
67 views

How come the postfix user can't even read its own files?

I have a Postfix configuration file. Let's assume it's named /etc/postfix/somefile.cf. I have run the following command as root to change ownership of the file to the postfix (105) user: ...
1
vote
1answer
174 views

Remove user space quota in Ubuntu 12.04?

I'm trying to install Unity3D but I only have 1.5GB (EDIT: I forgot to mention this is what the Unity3D installer says, but I have also had problems with downloading things of large sizes) free space ...
0
votes
3answers
213 views

How to stop regular users from Switching Users

I want to stop the normal users from using following commands /bin/bash /usr/bin/sudo /bin/su I added them in sudoers file but normal user can still use the following command This is how i add the ...
12
votes
1answer
493 views

How to tell sudo to repeat lecture once?

I'm letting one of my coding buddies have root access to my Raspberry Pi, and as I was getting everything set up, I tested sudo as him. It gave me "the speech": We trust you have received the ...
4
votes
1answer
6k views

Samba share permission denied user writing file but still shows

Very strange issue... Samba share on remote: [javaerpm] path = /u/abas/erpm/java force user = erpm guest ok = yes read only = no writeable = yes Mount command on local using ...
1
vote
4answers
2k views

Getting a list of users by grepping /etc/passwd

For a homework assignment, I need to use grep to parse /etc/passwd and get a list of all users (their usernames only, nothing else). It should use a pipe, and the results should end up in the allusers ...
4
votes
3answers
637 views

How to find a file with specific permission of a specific user?

How do I get a list of all the files which permission is "read and write" for a specific user. For example, when I go on the desktop of my mac, then right click on file "A", then "get info", then on ...
2
votes
3answers
181 views

How to create a user account with specific permissions?

I want to create a unix user account with specific permissions: this user must be able to install software, but can't remove software. Furthermore, when the user logs in, root must receive a ...
3
votes
1answer
619 views

How can a user run a program in kernel mode?

Is it possible for a user to run their own program in kernel mode? How could a user accomplish this? What weakness in the system's protection mechanism would they have to bypass? I'm thinking that a ...
29
votes
7answers
18k views

How do you kick a benign user off your system?

I was googling this a bit ago and noticed a couple of ways, but I'm guessing that google doesn't know all. So how do you kick users off your Linux box? also how do you go about seeing they are logged ...
2
votes
2answers
407 views

What does the `who` command result `root :0` mean?

The return value of command who will always include root :0 in X Window pts. I guess it actually means the GNOME login. Am I right? Another question is where to get this knowledge, as I don't see it ...
2
votes
2answers
231 views

Execute user script as root in startup applications

I just created a script (logscreenlock) to log lock/unlock screen events (derived from this post): #! /bin/bash dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'" | ( while ...
2
votes
3answers
9k views

usermod -d /path user - User is currently logged in

good Day I want to make a change to a user on my CENTOS server. I want to change his default directory. When running the command: usermod -d /path_to_new_dir david terminal gives me the following ...
11
votes
4answers
16k views

User-friendly command to list all users on Ubuntu system?

Is there a user-friendly command I can use to list users in a console on an Ubuntu system? When I cat /etc/passwd I get a hard-to-read list of users. It would be nice to see an alphabetized list, ...