The `useradd` command is used to create new users on a system.

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What will be the result when USERGROUPS_ENAB is set to no in /etc/login.defs and no groupname is specified when using the commnd useradd

The default command when we add a user is: sudo adduser -m -g initial_group -G additional_group -s login_shell user_name In /etc/login.defs USERGROUPS_ENAB is set to yes by default This means ...
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1answer
64 views

Can't add user because group already exists?

I initially added a user (adduser MYUSER) and then deleted it (deluser MYUSER). Now I'm trying to add it again (adduser MYUSER) and I get the following message: adduser: The group 'MYUSER' already ...
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1answer
39 views

Create multiple username and UID in Linux using shell script

In my environment I constantly have to attach an NFS server running on Linux. The Linux client system has user names created in it and they are in a sequential order. But in order to set the sharing ...
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3answers
29 views

Useradd w/o Home directory

I created a user without home directory using useradd -M Alice and set a password. Now when I login, I get this message No directory /home/Alice! Logging in with home= "/" -bash-4.1$ Can anyone ...
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2answers
41 views

Skeleton directory - how to add my own directories

I want to add a few directories to the skeleton directory. When I add new user I want to add my own directories to the new home directories.
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1answer
1k views

Why is /etc/shadow shortening the password that I've set with the command: useradd -p?

[root@P-dude dude]# useradd -p $6$Ic2PVlwi$2nf.IRWTMy0FHrPza6mh5wjomwbYtIIxnzxPZL7yg8SsvOdbjEpoI0G8uy7AqduYKQOn2R/rnnaalRmfPMy.a0 bwong20 [root@P-dude dude]# cat /etc/shadow | grep bwong20 bwong20:nf....
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1answer
25 views

Can I make it so that all new users created in the future will have an expired password by default? [duplicate]

I want to make it so that every time anyone creates a new user on my system that user will be forced to set a password during their first login. I can't find anything in /etc/login.defs that will do ...
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15 views

What does 'addgroup' do compared to 'groupadd' [duplicate]

I am new to Linux and have started using Ubuntu. One thing I am having issues with is adding users due to the lack of easy to find information on the subject. I have noticed that there are two ...
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17 views

Creating an user to access a specific director with just exec permission in Redhat

I am trying to create an user that I can access an specific folder and give this user just the execute access to a .sh script into REDHAT So I've created the user and set that user to the folder but ...
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17 views

useradd failing [duplicate]

Debian 8, I'm trying to allow a user to run Wireshark. user1@system:~$ sudo useradd -G wireshark user11 useradd: user 'user11' already exists However: user11@system:~$ groups user11 cdrom floppy ...
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1answer
210 views

Add user and set password using Ansible

I have created an Ansible playbook to create user and set password. But it is giving me an error ERROR: password is not a legal parameter of an Ansible Play Can someone help me with this? --- - ...
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1answer
12 views

processes that run during new user creation

I have two questions: What processes typically run when a new user is created? What processes run when an existing (regular) user escalates his privileges to gain root-access? I Googled a lot and ...
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0answers
48 views

Change default group for any new user

I'm wondering if you could change defaults groups for new users without having to specify all of them manually. I'm trying to harden my ArchLinux and there's a group (provided by Grsecurity) that is ...
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1answer
46 views

How to add 100 users from a file [duplicate]

I have 100 names no passwords and i have to create accounts for them under directory /home/top100 how do I do this? Because using useradd 100 times does not sound fun, and even if i did, I have no ...
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101 views

SHELL definition in /etc/default/useradd has no effect

I'm running Ubuntu 14.04 via Vagrant. Within /etc/default/useradd, I've defined the SHELL setting to be /bin/bash. useradd -D reflects this setting, however it doesn't honor the setting when ...
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2answers
135 views

Change user maildir to custom location upon creation of the user

I use Ubuntu 14.04.3 LTS . How to change the location of the Mailbox /home/user/Maildir/ to /Location/Mail/? I dont have to create home directory for that user. I did some changes in the /etc/default/...
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1answer
16 views

Is there any backward compatibility of -p (--path) option in user/group commands?

I upgraded from SUSE SLES 11 to SLES 12 and found that some user/group commands (such as useradd, groupadd, groupmod ... ) are no longer accept -p (--path) option to specific the directory of passwd, ...
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1answer
41 views

Creating new users via terminal does not assign correct permissions?

I am creating a new user for a Linux Debian distribution. I did use the command to create a new user via terminal, while I was logged in as root; tehn assigned the user to the sudo group, so I can ...
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1answer
133 views

Home directory for system users

What is the best practice when setting the home directory of system users that don't have a specific working directory. I often have to create users to run specific binaries or scripts. Supposing ...
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1answer
49 views

How to add users and add them to groups in linux bash

sudo adduser –G {teacher} user sudo adduser –G {teacher} user How could I fix this if user is an input variable and teacher is an existing group?
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101 views

useradd cannot execute / not owner error

I have Solaris 9. When running useradd as root i have this error. #/usr/sbin/useradd ksh: /usr/sbin/useradd : cannot exceute Then tried change shell csh and sh but to no avail. csh: # /usr/sbin/...
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40 views

User creation during authentication

I'm working with OpenBSD 5.6 and the goal is that I need to create user when he or she tries to authenticate with specific password. I've written a script for this purpose and everything goes ok but ...
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1answer
233 views

Using hashed password for adduser function in Linux

Sorry, I´m novice in Linux and I am looking for information, how to create new user account in Debian with pre-defined encrypted password. I have a function in bash, that if new user´s id´s are not ...
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1answer
115 views

How to delete an user account with terminal

I created a new account on my Linux OS, using the useradd command, now I want to delete the account created, I'm trying to use the userdel command to delete that account and I get the following error: ...
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1answer
129 views

Can't add users anymore by using useradd

Whenever I do # useradd -N --gid 1003 -s /bin/ksh --uid <some UID starting with 10027> --home /home/<someuser> <someuser> useradd just refuses to add any user and prints instead: ...
2
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1answer
75 views

delete user with non unique id

I created a user with non unique id passing -o -u 1000 -m option to useradd command. So now I have two users with same id but with different names and different home directories. I thought that this ...
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1answer
36 views

Lock down certain files

I want to be able to lock down files to be only executed and not editable unless root access is granted to the user. I have a file called 'server.properties' and I would like to make it so that only ...
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2answers
178 views

Can not create SFTP user Debian 7

I have a linode and I access via ssh throw terminal. I need to create an sftp user which his default directory (and the only he can access) is /var/www/xxxxxx.com/public_html/directory Now, I did it, ...
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1answer
406 views

How to create a user without group? [closed]

Is this enough to create a user without group? Command: adduser -N auser
3
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1answer
215 views

Why useradd -m doesn't fill created home dir with some defaults?

My motives: I want to create deployment script which prepare all system with just 1 click, and although learn Linux this way. So I don't want to use interactive utils like adduser (all interaction ...
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2answers
39 views

How to bulk add disabled-password users?

Doing: # newusers username::1002:1002::/home/username:/bin/bash ^D No password supplied No password supplied No password supplied newusers: (user username) pam_chauthtok() failed, error: ...
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132 views

How to add “system” local user like mysql or tomcat?

My system has a lot of users, I'v never created, like mysql or tomcat. These users have no home directories inside /home Obviously, a daemon programs run under these users. What is the term for such ...
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1answer
93 views

added username, user unable to write to home directory

I added several users to my server using useradd -d /home/<username> <username> . The users are able to log in and access their directories, but get Permission denied error messages when ...
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1answer
123 views

RBAC user cannot execute useradd on Solaris 10

I am trying to create a user in Solaris 10 using RBAC who can execute the useradd and userdel commands. But for some reasons after i create the profile, role and user, this user gets a permission ...
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82 views

Added new user, but can't access account - public key encryption

I added a new user to one of our servers, but can't log in to it via putty. The error message is "Server refused our key", and from putty, "Disconnected: no supported authentication methods available (...
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2answers
283 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 ...
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3answers
46 views

If I delete groups, are users in those groups deleted?

I use ubuntu 14.04 and made 120 users. 115 users are in "student" and 5 users are in "assistant". If I delete groups, then are users in those groups deleted too?
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1answer
946 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 ...
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3answers
29 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 ...
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2answers
708 views

Where & How is user group information stored in Ubuntu? [closed]

Two places possible: /etc/group and /etc/passwd. If I use command: adduser [username] [groupname], then the user would be added to the group, and the file /etc/group would then be updated. However, ...
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1answer
720 views

Implications creating System Accounts “useradd -r” Linux Fedora/RHEL/CentOS

I want to know what are the implications of create an account using -r option? # useradd -r ... The help says: -r, --system Create a system account. System users will be created with no aging ...
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1answer
168 views

Is there a common naming convention for daemon user accounts?

I'm from a windows background where I'm used to creating separate domain service accounts for running various services. I like to keep things need so I would name them DOMAIN\service.whatever I'm ...
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2answers
2k views

Creating Group and User for Tomcat RHEL/CentOS

I newbie I want to create an user for my Tomcat installation, but I was viewing multiple options: # groupadd tomcat # # useradd -g tomcat -d /usr/local/tomcat tomcat # useradd -g tomcat -c "Tomcat ...
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2answers
149 views

Add a user wthout password but with SSH and public key

I want to add a user to Red Hat Linux that will not use a password for logging in, but instead use a public key for ssh. This would be on the command line.
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1answer
78 views

Enable user login, there by login can happen either as root or user based on requirement

I am working with a board and when it finishes the boot, it gives us login as root user. What I want to do is to login as user or root based my requirement. Mean when the board boots up i should get a ...
0
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1answer
546 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 ...
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2answers
384 views

Create user from bash script

I'm in the process of making a bash script to automate adding a user. My password always have pattern, so I am setting that to a variable then... (this is where I am stuck -encrypting-). I found this ...
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1answer
176 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
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2answers
215 views

How to choose system user ID for custom packages (RedHat & compatible)?

How should I choose the proper uid (or gid) for system users being created in a custom .rpm package? The user will be used to run a daemon non-root. I think it's not acceptabe to let adduser choose ...
0
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1answer
3k views

What variables are valid within /etc/default/useradd file?

My /etc/default/useradd file is as follow: # useradd defaults file GROUP=100 HOME=/home INACTIVE=-1 EXPIRE= SHELL=/bin/bash SKEL=/etc/skel CREATE_MAIL_SPOOL=yes man page for useradd provides many ...