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

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4
votes
3answers
396 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
3k 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
34 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. ...
1
vote
5answers
218 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
719 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 ...
4
votes
2answers
238 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
160 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
145 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
584 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
169 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
214 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
2k 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
165 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
30 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 ...
10
votes
1answer
9k 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
305 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
221 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
168 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
644 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
161 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
401 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
342 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
1k 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 ...
1
vote
1answer
49 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
1
vote
1answer
405 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 ...
19
votes
5answers
10k 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
140 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
224 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
187 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: ...
8
votes
2answers
798 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 ...
26
votes
1answer
15k views

What does adduser do that useradd doesn't?

In addition to the more widespread useradd, Debian based systems also contain an additional adduser command which provides a higher level interface for adding users and some related tasks. There are ...
1
vote
0answers
71 views

Tracking user CPU hours

I am looking to work out which users on our system are using the most CPU resources. to check this? So I would like to find out: CPU-hours this month, (and % of total) CPU hours this week, (and % ...
6
votes
4answers
550 views

How to only zip the files of a specific user?

I like zip, it's simple, but recently I came with the need of only zipping the file owned by one user in a directory. I read the manual and I can't find any option to for example do things like: ...
1
vote
2answers
523 views

I can not log into Ubuntu 12.04

by ignorance and error I renamed the user_name of the directory /home/, called frank_account (home/frank_account) to sixven(/home/sixven) (using gksudo nautilus). Restarting Ubuntu, I get 3 users: ...
3
votes
1answer
906 views

/home/user: change directory failed error

I just installed Arch reading from the Beginners' Guide on the Arch Wiki. Once I rebooted Arch, I logged into root then I added my own personal account: useradd fox then passwd fox and set my password ...
0
votes
3answers
47 views

Set the default permission

When I create a file, the permission is 644 (user rw, group r, other r). How can I make the default file generated to have permission as 664?
1
vote
0answers
266 views

How is a username determined and can I hide the domain component in a winbind username?

Someone asked a question on Server Fault about a problem which I'm also having but no one has answered it so I'm posing a slightly different question to try and figure it out myself. I've configured ...
0
votes
3answers
729 views

Can sudo to user but 'run command as' is denied?

I was wondering how to run a command as another user from a script without password. sudo -l return: (root) NOPASSWD: /bin/su - someuser There is no problem to sudo as someuser. Command sudo su - ...
-1
votes
1answer
50 views

How to enable someone to SSH to my server from Windows? [closed]

I want someone from windows to log in into my server using SSH, so he can edit files and install things. Is there a step to step how to do it? I need to: Create his user account. Configure it, ...
2
votes
1answer
49 views

can't change user

I setup vsftp with my ftp users' home directory at /var/www but I realized, it wouldn't let em login by ftp, I tried to connect to 127.0.0.1. So then i wanted to "try out" my ftp user on the shell but ...
1
vote
1answer
117 views

super user group or user?

I am using the following command in Oracle Exadata: sudo su - odiadmin As sudo prompts for my own password, I am wondering if I upgrade myself to super user or do I switch to superuser ...
4
votes
1answer
152 views

How come each program or service has an account of its own in /etc/passwd?

I checked out the /etc/passwd file and I'm surprised to see that there are 35 different accounts, even though I'm the only user on this computer. I see that the accounts have names like mail, news, ...
1
vote
1answer
539 views

halt, poweroff, shutdown, reboot don't require root?

For some reason, I can run halt, poweroff, shutdown, and reboot as a regular user without root. How can I fix this? Is it something to do with user groups, or is it a seting somewhere?
1
vote
2answers
34 views

Backup server users creation

I have a RHEL server which acts as the web server for all the users (around 1000 users). Now, I have a backup script which backs up the data (all data inside /home folder) into an external HDD. This ...
3
votes
3answers
4k views

Whoami: cannot find name for user id 0

When I run whoami it says: whoami: cannot find name for user id 0 My /etc/passwd file looks like this: root::0:0:root:/root:/bin/bash
0
votes
1answer
68 views

How do I change user to uid/gid 760?

I requested creation of new user (so that all processes by particular program could be owned by this user). Our admin told me that this new user has uid/gid 760. Please, how do I switch to this ...
0
votes
1answer
492 views

Is it possible to make a standard user that can gain NO access to root?

I'm a very new beginner learning how to use Linux. I have very little experience so far in different distros. I've set Kali Linux as the OS on a remote PC. Users will be connecting to it via SSH and I ...