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

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0
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1answer
303 views

Creating a new FTP user and giving him only the right to 1 folder [duplicate]

I have a Linux Debian machine that I own (root access). I would like to create a new user called "testuser" and give him the right to view, edit and delete files from only one specific folder ...
4
votes
2answers
180 views

How can I run a program as another user in every way?

Background I'm trying to restart some programs (mail-notification and stalonetray) regularly, as they appear to die frequently. I want to set restart them whenever NetworkManager reconnects. Hence, I ...
7
votes
2answers
104 views

How to completely remove the user subsystem from Linux?

Is it possible to completely remove the user subsystem from Linux. I'm NOT talking about preventing people from logging in. I'm talking about removing the parts of the system that even make it ...
0
votes
0answers
64 views

root's login shell is invalid, how do I restore it?

I have accidentally changed the root user's shell from /sbin/sh to /sbin/false. I don't have any other login and the only way I can access to system is through SSH. How can I retrieve back root ...
0
votes
0answers
82 views

Creating a new user for FTP with access to a specific dir

After following all of the instructions found here: How to create a FTP user with specific /dir/ access only on a Centos / linux installation I am having some troubles. For some reasons the new ...
2
votes
1answer
119 views

How to Use who/w with Non-Interactive SSH logins

I'd like to perform selective shutdown of a server in my house after backing-up over SSH. My post-backup script waits for five minutes and then runs a very short 'safe shutdown' script located on the ...
-2
votes
1answer
592 views

Changing normal user uid to 0 to normal uid

I have given a normal user root permissions on Linux by using this command: usermod -u 0 -o username How can I go back and make the user a normal user again? ex: # grep Jack /etc/passwd Jack :x:...
1
vote
2answers
127 views

Lock a user with his home folder

Is there any way of making a user only able to see and modificate his home folder? I am currently on arch linux. Just explaining a little better, the user would not be able to see /etc or any other ...
3
votes
0answers
110 views

Use network-manager in different netns

In continuation of my last question about using netns as a relugar user, I'm now looking for a way to open VPN tunnels as a regular user. So I naturally thought about network-manager. Any user can ...
0
votes
2answers
327 views

What user should I create and execute cron jobs as? Apache? Root? Me?

I'm setting up a new Webserver and having trouble getting cron to execute as expected. I am using a script to create cron jobs in .tmp/crontab.txt, which is then moved to /var/spool/cron under the ...
0
votes
0answers
30 views

sftp user with appropriate permission

I'm new to linux user permissions and having trouble configuring a user. So the scenario is, I have apache installed on centos. I've a virtual host with document root at /var/www/sitename/public_html ...
0
votes
0answers
83 views

How to Duplicate user?

I'm in Cloud 9 IDE, and I want to clone the default user for better collaboration. I know it's not just a simple copy of the /home/<username> folder from Archlinux wiki, which tells me about ...
2
votes
1answer
485 views

Checking how long a user has been logged in

Is it possible to check for how long a user has been logged in? Or when the user logged in on an Unix/Linux system? I logged in as another user on my system a while ago and I would like to now how ...
0
votes
1answer
101 views

Where do service permissions come from

I'm trying to broaden my knowledge of the events surrounding system startup. I see that there are many process which are started without root level permissions. e.g. rsyslogd is listed as running ...
2
votes
1answer
853 views

usermod always reports user does not exist on RHEL 6.6

My RHEL 6.6 VM is running behind Centrify Active Directory. When I do sudo id 'any_existing_user' it will give back info about that user. But when I do sudo usermod -c 'Comments' '...
2
votes
2answers
329 views

Can I log in into a system user after I create him?

On an Ubuntu machine, if I run the following command: adduser --system --no-create-home system-user I create a system user named system-user without home directory with /bin/false as the shell. This ...
-1
votes
2answers
262 views

Passwordless login (from physical console and from others users)

How to configure an user (in debian) to login without password ? An user without password needs to login in physical terminals (ttys - not pty) either using su - user from another user, without ...
2
votes
2answers
574 views

Bash cannot act as nobody and nogroup?

I have a log file that was created by nobody:nogroup, which is activity being logged to, I wanted to emulate adding a message to that log file. My first thought was to: $ sudo su nobody This account ...
1
vote
1answer
62 views

How to find userID after login as root using pmksh?

I am trying to gather the username of the actual person logged in the server instead of just showing root. After entering pmksh, the prompt changes to root@hostname. When I do echo $USER the result ...
1
vote
1answer
1k views

Linux/Unix username length limit

Would it be difficult to increase the limit or would it just be a one-place change? I have a system that could really elegantly make use of the Unix multiuser model for process isolation but I'd need ...
0
votes
0answers
316 views

Using CentOS as a thin client

I have about 50 desktop PCs running CentOS. These will be used as "thin clients" for users to access their real desktops (VMs) using some flavor of NX technology. So, the PC on the user's desk is a ...
1
vote
3answers
30 views

Set up a user for a program

/etc/passwd shows many "virtual" users that are essentially for programs to use, rather than for people. How do I go about setting up such a user? All I need is a user that isn't used for anything ...
1
vote
2answers
37 views

User verification

Suppose I've writen a setuid root executable and I want it to verify that the user is not a script by asking the user to provide his/her password (granted, users might save their password and use that ...
1
vote
2answers
78 views

The Deny the permission of mounting any drives to a user

I'm using Linux Mint 17.2 Cinnamon. There are multiple partitions on /dev/sda. /dev/sda1 is where the system resides, /dev/sda2, ..., /dev/sdaX are NTFS partitions. There are two users admin and user....
10
votes
4answers
2k views

what does star in passwd file mean?

I have a computer that I need to boot into, but the passwords seem to be bogus. Additionally i cant mount the drive for writing, and it is a mips processor, so I cant stick it in another machine to ...
1
vote
1answer
47 views

Restricting CPU time of processes by executable path

Is there a way to restrict CPU time (duration) for all processes which are invoked by executables that are located in a certain directory? I would like to be able to auto-kill all applications which ...
0
votes
1answer
45 views

A specific user can't login (after connecting TV), can't figure out why

I have lately installed Debian Jessie on my Dell XPS (1401x, GPU is NVIDIA 425M), installed the NVIDIA driver, and everything worked well. This evening I connected my laptop to my TV via HDMI (not ...
1
vote
2answers
90 views

2 passwords for login

On Linux, I would like to to set up a user account in such a way that the user would have to enter 2 passwords to log in. Is this possible, and what would be the implications of this?
0
votes
0answers
24 views

A puppet configuration style for users

I want to set a configuration managment utility for users, like puppet but for users, I need to install one package or another or apply one manifest (in puppet) in order of the user that is logged in ...
1
vote
1answer
136 views

Unable to login as a newly created user

I have a dual boot Kali Linux along with windows 7. Now when I installed Kali it logs me in as root. I do not have a login in my name. So I created a user with the following steps. However when I ...
1
vote
1answer
80 views

Apache Tomcat and Httpd - Sharing common web publication folder - CentOS

Suppose: The Httpd's Web publication folder is assigned according: Edit /usr/local/httpd/conf/httpd.conf file: DocumentRoot "/usr/local/WebFiles/Html" <Directory "/usr/local/WebFiles/Html"&...
2
votes
1answer
90 views

How does file system permission behave on different systems sharing an NFS export?

I'm familiar with how Linux permissions work on a single machine, but what happens when a directory is shared (specifically via NFS)? Also, what happens when two users are seemingly the same (same ...
0
votes
0answers
269 views

Unable to delete a user: user test is currently used by process xxx

I'm trying to delete a user: pgrep -u test ps -fp $(pgrep -u test) killall -KILL -u test userdel -r test But the last command always returns userdel: user test is currently used by process xxx ...
2
votes
1answer
66 views

Why does the `users` command return different users depending on whether I ssh or open a new terminal?

How does users define what users are logged in? If I ssh into a box twice, I see my username twice listed if I execute users. However, if I create a new login shell via sudo su -, I do not see root ...
1
vote
2answers
115 views

How to get rsync to complain if user not found

I'm moving files over from my old server to my new server. By the time I'm doing it for real (as opposed to just testing) I'll have all the "user" users (the non-system users, i.e. >= 1000) created on ...
1
vote
2answers
106 views

Running program using X while different user logged in with gnome shell

My situation is I am logged in to gnome with a user, and through the terminal I am trying to run steam as a different user with the error unable to open a connection to X. Both users can run steam ...
0
votes
1answer
100 views

list users who are all created by current user in linux

I have set of users with root access.I want to know list of users who are all created by currently logged in user. From below structure if user1 login to system , how to list user's like user11,...
1
vote
0answers
35 views

Is it allowed to assign one range of subordinate IDs to two different users?

Is it allowed to assign the same range of subordinate user and group IDs to different users on the system defining the subordinate IDs? Please provide sources for your answer. The idea here would ...
4
votes
2answers
280 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 ...
2
votes
2answers
421 views

Getting Group Names for List of Users

I have a text files with a list of users formatted like: name1 name2 name3 ... Calling the command groups gives the primary group name for that user. ex: bash$ groups name1 name1: ...
1
vote
2answers
62 views

Adding user to the group owning a folder doesn't give that user access

I have the following folders: drwx------ 4 ccote domain^users 4096 Apr 17 11:18 ccote drwxrwx--- 2 ccote ccote_jponchar_gnicolas 4096 Feb 20 10:58 ccote-jponchar-gnicolas drwx------...
0
votes
1answer
580 views

Restrict user to do SFTP on the www folder owned by www-data group

I would like to create a new user with read/write privileges ONLY in the /var/www/ directory including all sub-directories. The /var/www/ is owned by a group called www-data. Best way to do it I ...
13
votes
3answers
466 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
52 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
183 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
73 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
42 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? ...
19
votes
5answers
2k 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
1k 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
193 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 ...