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

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7
votes
1answer
102 views

How can I keep user acccounts consistent accross multiple machines?

I now have a Raspberry Pi which runs Debian Wheezy. I have a couple machines (4 physical, 2 virtual) sitting here and I would like to unify the user accounts on those machines. The machines I run ...
2
votes
5answers
4k views

Changing user while scp

I need to copy file between Linux machines. The problem that the user I use to login (myuser), is different from the user that can access the file. If I just ssh to the machine, I can switch the user ...
2
votes
1answer
53 views

SSH'd into a computer, uptime / who / users report 0 users?

I'm ssh'd into a server. Why doesn't the server report it? # uptime 21:54:28 up 13 days, 3:47, 0 users, load average: 1.18, 1.11, 1.13 # users # who I'm not really sure I understand it ...
20
votes
6answers
13k views

How do you create a user with no password?

In os X it's possible to have users without passwords. If you inspect them with dscl their password show up as *. This is used for system users such as users for databases like mysql, pgsql etc. ...
1
vote
1answer
662 views

NFS file owner(uid) = 4294967294, can't do much with my mount, How do I fix this?

I have a somewhat strange setup going on here, I have Android as the client and it's kernel does not support NFSv4, also my /etc/exports file on the server side has no NFSv4 style entries. I am ...
2
votes
0answers
79 views

Easiest way to sandbox an user

I'd like to sandbox a user so that they can only read files under /media/shared/somefolder. What's the easiest way to accomplish this? Users/groups? ACL? AppArmor? Some context: Plex Media Server is ...
3
votes
2answers
1k 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 ...
11
votes
1answer
446 views

How is file owner and group remembered for an external drive?

I formatted an external hard drive with an ext4 partition and subsequently mounted it. So that I could use the new partition, I did: sudo chown me:me /mount/directory to change the file owner and ...
1
vote
1answer
73 views

backup user accounts without giving a home directory to them

I am reinstalling the older Ubuntu machines with the latest RHEL 6.0 in servers. I have /etc/passwd and /etc/group and /etc/shadow file backed up for the list of user accounts that I need to create ...
1
vote
0answers
30 views

Changing pasword for debian live

I have a hooks file, in the hooks folder, that looks like this: echo "root:rootpw" | chpasswd echo "user:userpw" | chpasswd After boot, Debian asks for user and password. When I type user along ...
4
votes
1answer
3k views

What audit log files are created in linux to track a users activities?

One of the machines on our networks was consuming a large amount of Internet bandwidth. However no user was using the system. When I connected to the server using SSH and ran who it showed that a ...
2
votes
0answers
281 views

Add a user for Postgres on Mac

I've had a very difficult time trying to set up a postgres database. I am using Mac OS X 10.9.2. I am using this tutorial: http://tutorials.jumpstartlab.com/topics/environment/environment.html The ...
0
votes
0answers
21 views

getgrent() never terminates in NIS setup

I have an NIS setup on my Linux box (from nsswitch.conf): group: compat nis When iterating over the group entries (using the getgrent() function), the iteration never terminates. For example: ...
3
votes
1answer
83 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 ...
2
votes
1answer
1k views

Home Directories and pam.d using LDAP

Background: I'm not too familiar with the ins and outs of pam and LDAP authentication on a configuration side. I've used systems that use pam but I've only worked on applications, not systems ...
4
votes
3answers
264 views

Is it possible to get uid table in Linux?

I'm a student in a university and I can finger and id all users (students etc) through SSH. Here is the id command e147200@beluga:~$ id e201634 uid=22678(e201634) gid=3561(stat_bs) ...
8
votes
1answer
3k views

How can I do NFSv4 UID mapping across systems with UID mismatches?

I am working in a lab with three Ubuntu systems, and I would like to cross-mount some filesystems via NFS. However, while the systems have some of the same usernames, the UIDs and GIDs don't match, ...
3
votes
3answers
2k 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 ...
1
vote
0answers
26 views

Change the HOME of a user during a graphical session

The other day I had the idea to create display manager independent guest session. My basic idea was to change the login shell to a custom program that creates a temporary home on the fly (f.e. ...
0
votes
5answers
192 views

How can I download all usernames?

I have access to a university's Linux server where all students have accounts. I can retrieve their full name by typing the finger username, and their departments by typing id username. All the ...
1
vote
1answer
476 views

How to copy files as Jenkins “post build” action if i don't have privileges to destination directory

I have the following users "architecture" : root access is disabled. admin user have access only to its home directory. Apache runs as root service (root is the only one that have access to ...
3
votes
2answers
129 views

User created without a password behaves as if he had one

Inside one of my scripts, I created an user based on a directory arrangement on another machine. The thing is that this user, created without a password, behaves just as he had one : he has sudo ...
0
votes
1answer
105 views

Can't simulate initial login using sudo

$ sudo -iu cyrus sudo: unable to change directory to /srv/cyrus: Permission denied sudo: unable to execute /bin/zsh: Permission denied I don't understand why I would get permission denied for ...
4
votes
1answer
93 views

How do you give a developer group access to apache, MySQL, php and the webroot?

We have 3 web designers that are currently logging in to our server via root to configure apache and setup websites. I have very basic linux knowledge (I'm a web designer) and have created users and ...
-1
votes
1answer
233 views

How to Always make the ttyUSB0 none root access allowed?

Ubuntu 13.10 64-bit OS. I have a service running using Python serial the application running without root as username. But it has to access /dev/ttyUSB0 , so i need to do every time manually chmod -R ...
1
vote
2answers
84 views

Command to know privileges of a user group

If I run cat /etc/group command or groups username I am able to know the list of groups as group of a particular user. Is there any command through which I could know which type of privileges a ...
0
votes
2answers
141 views

How do I log in as non-interactive user? (e.g. mysql)

I need to run a command mysql_upgrade which, when ran as root, returns Looking for 'mysql' as: mysql Looking for 'mysqlcheck' as: mysqlcheck Running 'mysqlcheck' with connection arguments: ...
0
votes
2answers
1k views

Bash script to remove user

I need to create a Bash script to remove a user. We use RHEL version 4, 5, & 6. Lets say usernames are Ray4 & Ray6 & the script name is deal. Specific tasks for this script are: Does the ...
1
vote
1answer
100 views

user accessing and permission denied

I had a user john in fedora 19 usergroup marygroup useradd -g marygroup mary usermod -a -G marygroup john In John terminal: cd /home/mary Permission denied cd /home ls -l drwx------. 11 john ...
1
vote
0answers
28 views

How to block the user for a certain amount of time

Suppose, I am working in X environment, and I want to have an obligatory periodic rest. Is it possible to setup a root cron job, that will block my user for 5 minutes every 45 minutes? I am using ...
1
vote
0answers
45 views

Disable commands for users [duplicate]

I have users that login automatically via ssh to a script I defined instead of a shell. The script basically launches a program which has a shell-escape in it which would allow the user to execute ...
8
votes
1answer
3k views

Use different username by default for a specific host

I have a different (assigned, non-changable) username on one of the servers I log to regularly, and I would like to avoid writing it down every time. Can I make these lines [tohecz@localhost ~]$ ssh ...
3
votes
3answers
243 views

How to switch back and forth between users quickly on a single terminal?

I'd like to switch to another user without logging out the first user, then log in as a third user without logging out the other two, and so on, then switch between all users quickly. I'd like to ...
1
vote
1answer
208 views

security concern around adding cron user to web application group

I have a permissions issue on my CentOS 5.6 machine with regards to the cron user. On my test/staging environment my cron user (picco-cron) is a member of one group - picco-cron, as below: ...
6
votes
1answer
111 views

What are the side effects of having several UNIX users share one UID?

The sys-apps/shadow package on my GNU / Linux system comes with a useradd command that supports an option that I have previously overlooked: --non-unique. For the sake of convenience when shellig home ...
8
votes
3answers
517 views

Why is konsole reading /etc/passwd?

In relation to this question: While observing the behavior of fatrace, I notice something which concerns me. Here are the first few lines of output of the command "fatrace|grep konsole" ...
-1
votes
1answer
142 views

What can I do if I got locked out by cphulk?

Is there any way in Linux to create another user with root rights? I got locked out by cphulk and I need some other way to log in. Notice many ways to fix this involve logging in to root or whm. ...
0
votes
1answer
201 views

Creating operating system (OS) user in Oracle LINUX

I am a user with sudo access. To install MySQL, I have to create an operating system (OS) user called MySQL. Can I create a user which also has sudo access on this machine?
1
vote
1answer
238 views

HOWTO check if a user account is blocked against /etc/shadow

After set the Account Expire parameter on /etc/shadow (field #7) to 90 days,I need to know where to look around if an user account is locked down or not after those amount of days. Right now, the ...
2
votes
1answer
929 views

Create ssh user which can only access home directory [duplicate]

I read documentation on the internet on how to create a new user with SSH access. I figured it out and to create a user is quite simple. The next step I want to take is to jail this ssh server to the ...
55
votes
4answers
13k views

What are other ways to share a tmux session between two users?

I'm looking for a clean and easy way to share a tmux session with another user on the same machine. I've tried the -S socket-path option, but it requires opening up all permissions of the socket-path ...
1
vote
1answer
47 views

Will having dozens of inactive logins hurt performance

I work on a cluster shared with ~20 users, many of them operating remotely. It's quite common to open the login node, type users and see ~100 users listed, mostly the same user logged in multiple ...
0
votes
0answers
33 views
18
votes
4answers
13k views

How do I completely disable an account?

How do I completely disable an account? passwd -l will not allow anyone to log into an account using a password but you can still log in via private/public keys. How would I disable the account ...
1
vote
1answer
136 views

What is `plan` for users?

Sometimes, I use finger - and I can't help but notice that when I specify a user: finger admin - The last thing the output says is: No Plan. What does that mean? Where can I find out more about ...
18
votes
5answers
7k views

Add a user to the system *only if it doesn't exist*

I've been running the useradd {user} command to add users to my system, though I plan on running this in an automated environment, and it might end up being run again, even though the user already ...
0
votes
3answers
124 views

Switch user on terminal

I'm switching user using command: sudo su - userName On my terminal I always have: user@user directory $ (some command) But when I switch user I have only : $ (some commands) It is hard to ...
4
votes
2answers
143 views

Why are newly created users assigned to primary groups of their usernames?

I've noticed that on a number of linux distributions that whenever a new user is created, it is assigned to a primary group of its own name. eg. If i create a user called "testuser", by default it is ...
3
votes
1answer
169 views

Enable superuser when logged in with another user

Suppose that the machine has two users: Alice (admin) Bob (standard user) While Bob is logged in, how can Alice modify a root file (Bob does not have this permission even with sudo)? Alice tried: ...
7
votes
2answers
703 views

How do I add network or user source connection data to history entries?

I would like to modify the history settings for all users on the systems that I manage. I would like it to contain the information from the connecting terminal like from who sysadmin:/ # who sysadmin ...