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

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10
votes
2answers
326 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 ...
0
votes
0answers
36 views

Use sudo as login

I've picked up the habit of using sudo and disallowing root logins. In cases, sudo is integrated with GUI configuration tools that require it. Are there any serious efforts to replace login and ...
1
vote
0answers
39 views

Shell Script to change user shell

I am writing a script that would be invoked to change user shell. The basic requirement is that once user gets authenticated (e.g: thorough some web application) the script would be invoked to set the ...
0
votes
2answers
41 views

Setting Up SSH. Just need some understanding

My goal is to build a LAMP server on my arch linux laptop. The main reason is for a web server. The other reason is to learn about how all this administration stuff works. My setup is a laptop with ...
0
votes
1answer
28 views

Killall processes under a user?

So, I know you can pkill -U <uid>, but whenever I've used this, my entire system crashes. Further investigation shows it probably is because I'm not matching anything, so it matches everything? ...
18
votes
5answers
541 views

Find files that a user can write, efficiently with minimal process creation

I am root. I would like to know whether a non-root user has write access to some files - thousands of them. How to do it efficiently while avoiding process creation?
1
vote
4answers
219 views

How to “cat /etc/shadow” on an HMC?

hscroot@hmcserver:~> grep root /etc/group root:x:0:hscroot,ccfw hscroot@hmcserver:~> hscroot@hmcserver:~> ls -la /etc/shadow -r-------- 1 root shadow 5252 2015-05-06 19:36 /etc/shadow ...
0
votes
1answer
31 views

create a linux user with create files and write permissions without sudo access

I want to create a user in such a way that it can create a file and update the contents of the file. useradd username Now for sudo, we can create username and linking to sudo like below: useradd ...
2
votes
2answers
52 views

Find files created by a particular user

How would I go about discovering all of the files created by a particular user and display them to the screen? I've started a script that prompts the current user to enter the username of whom they ...
0
votes
1answer
27 views

Command to list PostgreSQL user accounts?

There are createuser & dropuser commands: createuser - define a new PostgreSQL user account dropuser - remove a PostgreSQL user account Is there a corresponding way to list the user accounts? ...
0
votes
1answer
38 views

linux + send wall message only to the specific user

As all know , we can send broadcast message to all users on Linux machine But how to send message only to the specific user? For example #who rodegc pts/1 2015-05-04 04:23 (10.4.72.1) ...
3
votes
2answers
99 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' ...
-2
votes
0answers
45 views

Longest/shortest Username in linux

I'm trying to configure a script that displays all the users on the computer, the groups they belong to, and the shortest/longest usernames. I have the first part set up with the users and groups but ...
1
vote
1answer
48 views

Difference between adding sudo user with adduser or gpasswd

To add a new sudo user I believe I can call: # to create a new user sudo adduser newusername and to allow this user to use sudo I can do: sudo adduser newusername sudo or sudo gpasswd -a ...
1
vote
2answers
78 views

How to show all registred users and their groups with one command?

I was writing a test on basic Unix commands etc, and there was a question show all registered users and their groups with one command. At the same time I can't use getent command.
3
votes
0answers
14 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 ...
0
votes
0answers
25 views

When does the “/mnt/username_home_dir” appear?

The problem I have to solve requires the access to the /mnt/username_home_dir directory, but there is no such directory present, despite me creating a user and auto-creation of his /home/username ...
8
votes
4answers
722 views

Why are there many accounts? I'm the only user

I am running an Ubuntu 12.04 desktop system. So far I have only installed some programs (I have sudo rights). When I check the list of users on the system, I see a long list, like more than 20 ...
2
votes
3answers
96 views

How to limit the number of active logins per user?

How can I limit the number of active logins per user? I've seen this on various servers before, and I was wondering how I could set this up myself. Perhaps in those cases, this was accomplished by ...
3
votes
3answers
72 views

How to add a user to a group in FreeBSD

How can I add an existing user to a group in FreeBSD? The command usermod does not work.
2
votes
4answers
273 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?
0
votes
1answer
33 views

how to view failed login attempts?

I tried to view failed user login attempts since a specific time. But all methods I found by searching the internet does not work. I am using openSUSE 13.2. journalctl -a --no-pager ...
0
votes
1answer
41 views

Prompting for a password on sudo?

I'm creating users using Puppet. Here's the gist of what I'm doing in Puppet: user { 'ntkay': name => 'ntkay', uid => 10000, home => '/home/ntkay', managehome => true, ...
2
votes
0answers
43 views

Catch/diagnose user process being killed - Inexplicably logged out automatically

Context: I'm using bash in Mac OSX Yosemite. Problem: I'm executing a (python) script that I expect to use alot of resources and take a few hours to run, redirecting stdout and stderr to a log file. ...
2
votes
2answers
64 views

Any concerns with using high UID numbers (3000+) on RHEL5+?

The legacy systems has UID numbers up until the low 2000s. In implementing a new user management system, I am looking into options to avoid UID collisions. One option is to just have a list of UIDs ...
2
votes
1answer
38 views

Why am I seeing a number as owner / group instead a name?

CentOS 6.x / OpenVZ Recently my VPS provider moved my OpenVZ container to a new server. After that move, I've noticed that files/directories for one of my user accounts show an odd owner / group. ...
1
vote
2answers
46 views

dialout group missing

I have debian8, (Jessie) and I am trying to add a user to the dialout group. Alas, that group doesn't exist. I would prefer not to add the user to the root or sudo group. what should I do? ~$ ...
-2
votes
1answer
36 views

Print 25 usernames on the system starting in reverse alphabetic order. Print only the usernames,

how to Print 25 usernames on the system starting in reverse alphabetic order. Print only the usernames, nothing else. You should get the information from the /etc/passwd file.? in UNIX Command
-3
votes
2answers
45 views

How to Find the number of password entries that are on the server? in unix [closed]

Find the number of password entries that are on the server? in UNIX
3
votes
2answers
268 views

How to Find UID, GID, and any groups I belong to?

How to Find UID, GID, and any groups I belong to ?
2
votes
2answers
51 views

How does one permissibly access files on non-booted system's user's home folder?

I have a dual boot system with Mint 17.1 and Centos 6.6 I want to access a file in my CentOS user's home directory from Mint. (I cannot boot CentOS right now.) What is a clean/standard method for ...
0
votes
0answers
13 views

What's a good setup for a web server with limited developer accounts?

If possible, I want to avoid giving root access to developers. What would be the best directory/user/permission setup to make sure they can access the web server directories, but nothing else? Should ...
1
vote
1answer
37 views

Linux Create user with specials login options

Hello i need create some users with special privilegies that will be: A user that can only login with ssh, no local, it can do anything in pc search, find, etc like a normal user but only with ssh. ...
0
votes
1answer
26 views

Is there any way of knowing who [including remote users] can access a paticular file / folder?

In Windows you could enter file properties and see which users have an access to a patricular files. [Including remote users / groups that are part of your domain] In unix when you enter properties ...
1
vote
1answer
109 views

How to delete remaining files of removed user?

I know deleting user with userdel username can cause information leakage and other security issues (as tutorial book says, administrator should delete user with -r option). But i tried it to see what ...
1
vote
1answer
95 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
2answers
62 views

how to list users in a group and their passwords

How do I view a list of users in a specific group and their passwords or attributes? I know to use cut -d: -f1 /etc/passwd But this only lists users.
1
vote
1answer
32 views

which command will give complete user creation in RHEL?

I want to create a user in RHEL 6.5 and i have three commands (1)useradd (2)adduser (3)system-config-users which one will give the complete user creation.
1
vote
1answer
56 views

How to give user access to specific folder in home directory

I'm trying to set up a 'deploy' user on my VPS (running CentOS 6 and cPanel) which needs to have access to a specific folder from another home directory: /home/nazeem/public_html/staging. I've ...
2
votes
0answers
41 views

Is it possible to register “virtual” user/group IDs in a Linux system?

Is there a standardized mechanism in Linux which can be used to tie usernames to user IDs without actually creating a system account that can log in? It would seem something like this is possible, ...
1
vote
0answers
35 views

Linux user ssh connection disabled after execution of setfacl command

I have very little linux administration experience, after searching a lot stuff online, finally I decided that I must hope that someone helps. The problem is, I needed to share an account with a ...
4
votes
2answers
762 views

What is nobody nobody user and group?

On my server (Synology DS212) some files and folders have nobody nobody users and groups. What are the characteristics of this user and group? Who can write of read this file? How can I change it ? ...
2
votes
1answer
56 views

How to set up users, ownership and permissions across local and remote servers?

I've been learning the Linux OS over the last year or so and I am still very confused on how permissions vary from different configurations. I am trying to set up my local development environment and ...
-1
votes
2answers
63 views

Prevent autologin to the admin account

I am a new user of Linux. I have both window 7 and Ubuntu 14.04. For my family and friends, I make Guest account but when I restart my laptop and operates with Windows 7 then options are comes for ...
0
votes
1answer
66 views

Why does transmission adds a new user to the system?

When I installed transmission, I've seen here that I need to change the ownership of some groups to able this to work with my raspberry pi. First of all: why does transmission adds a new user to the ...
0
votes
3answers
77 views

Adding new user in Linux

I created a new user in Linux using useradd connectweb and I see the following in the /etc/passwd file connectweb:x:1002:1002::/home/connectweb:/bin/sh but when I try to navigate to the folder ...
0
votes
1answer
300 views

SCP without password prompt using different username [duplicate]

I have 2 servers, Server1 and Server2. On Server1 I have a user named user1. On Server2 I have the user named user2. I need to be able to write a script that runs on Server1, which will scp some ...
0
votes
1answer
20 views

What should file permissions be set to in order for an FTP editor to work?

I installed git on my server and cloned my development repository using the root user. The permissions appeared to have been set to: Files: -rw-r--r-- Directories: drwxr-xr-x I previously had ...
1
vote
3answers
98 views

Why is the home directory not created when I create a new user?

I created a new user (testuser) using the useradd command on an Ubuntu server Virtual machine. I would like to create a home directory for the user and also give them root provileges. However, when I ...
3
votes
1answer
39 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 ...