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Questions tagged [login]

the process of logging in: from the login prompt, through user authentication, to session startup

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16 views

CentOS doesn't go to login screen after kernel update from 3.10 to 5.06 on my HP ML150 server [on hold]

Installed CentOS 7.6 on my HP Proliant ML150 Gen9 server which came with kernel version 3.10. Immediately upgrading kernel to latest mainline version 5.0.6 caused the problem which is being not able ...
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0answers
31 views

How to fix Kali login grey screen bug [duplicate]

I have a Asus Rog Strix GL703GE and i was installing Kali on my second hard drive. When i do the login, a grey screen appears and everything freeze. What can I do to start graphical without bugs and ...
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44 views

Abnormal behavior on Debian 9 after crashes

After I tried to install swift on my Debian 9 machine, Suddenly I faced a big problem (I couldn't access Debian GUI) I solved this issue by some terminal command like sudo apt-get install gdm3 and ...
3
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1answer
72 views

How to configure a shutdown at the xth wrong entered password?

Having an encrypted hard drive is all well and good, but chances are that if someone is gonna steal your laptop, it’s probably not going to be turned off. Most likely, it will be stolen in a powered-...
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0answers
33 views

How to unlock the login for the root?

How to unlock the login for the root? In Ubuntu 14.xx and previous versions of Ubuntu, it was possible to log in to the graphical session as root. Now i can't do this anymore. How to unlock the root ...
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1answer
28 views

Trisquel:What to type when I set a blank password? [duplicate]

I recently installed trisquel on my computer. When I decided to use the terminal and sudo I was prompted to use a password despite the fact that I set a blank one. I want to know what I am supposed ...
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0answers
25 views

Is it possible to set at or cron job at logon event? [duplicate]

Is it possible to write an at or cron job script that will execute on a particular user's logon? If so, what will be the method?
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1answer
54 views

Mint - disk is full (prevents login)

I had 0 bytes free and even when I deleted something the number of free bytes stayed still zero. So I tried to restart it and I can't login now. I tried console Ctrl+Alt+F1, but I don't know login. I ...
3
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1answer
47 views

logout/login not enough to update group membership

I just added myself to "docker" group on my workstation. I dutifully logged out and in again on my desktop environment but I'm still not on the group: mcon@cinderella:~$ id uid=1000(mcon) gid=1000(...
1
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1answer
34 views

Centos Installation base environment only showing basic functions

I am currently interested in learning how Linux works. I have followed the tutorial How to Install CentOS 7 on VMware Workstation 14 Pro? The problem is, every time I install the only available Base ...
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2answers
93 views

What does the Unix login program/command do?

I am reading APUE and it keeps refering to the login program, but I still don't know what it is doing in my operating system (Ubuntu). §8.11: Normally, the real user ID is set by the login(1) ...
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4answers
597 views

How can I track script which gives me “command not found” right after the login?

When I login, I have these messages: -bash: $'\r' : command not found -bash: $'\r' : command not found -bash: $'\r' : command not found It is quite clear that it is caused by Windows-style line ...
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0answers
32 views

Ubuntu 16.04 - Cannot SSH with root user, login successfully but closed immediately with return code 254?

I could SSH to 1 server with a non-root user. However, I tried to enable root login at /etc/ssh/sshd_config with this content: # Package generated configuration file # See the sshd_config(5) manpage ...
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0answers
17 views

When I connect my Wacom to the PC, Debian gets stuck to Login screen

As title says; also: everything was working fine, I followed all the steps I found in the Linux Wacom Project https://linuxwacom.github.io/ and at the end of the process I could use the tablet with no ...
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0answers
17 views

Can some or all profile/login scripts be bypassed on local console login?

The situation I'm thinking of is that something in /etc/profile or ~/.profile or ~/.login or similar is causing you to be logged out immediately or some other problem/mischief, and you're at a text-...
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3answers
55 views

Seeing user two times

Consider I have created a user 'test' during Installation which I use to login to my system. My root user is 'root'. I further open two terminal sessions for each of the users respectively. Now the ...
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0answers
70 views

Very slow login, logout and su on Centos 6.8

It's been two weeks that ssh login, logout and using su to other users on a CentOS 6.8 server been very slow, it takes around 20 seconds to 45 seconds for the login or logout or su to take effect. All ...
1
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1answer
31 views

Linux Mint with AMDGPU, Monitors drop signal after Mint boot animation

I installed Linux Mint MATE 19.1 and installed the AMD MESA 18.x+ drivers as shown in the Wiki (adding ppa:paulo-miguel-dias/pkppa and upgrading). Here are my specs/setup: Make/Model: Dell PowerEdge ...
1
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1answer
76 views

How to configure Linux to authenticate users based on Keycloak user database?

I have an existing user database in Keycloak. I want to build a Linux machine which logs in users according to the user database in Keycloak (username, password). How can I accomplish this?
1
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1answer
23 views

A single unified account for all users on a single machine, while preserving separate credentials

So this is more of a reverse-engineering question. We have this machine at work, where anyone can login using ssh. ssh johndoe@gateway01. However! Once logged in, the user the person is logged in as ...
1
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3answers
55 views

Can a Solaris 11 account prefixed with # be used to login?

I have been given a list of accounts on a Solaris 11 server that contains several accounts which are prefixed with a # character: "#username". (No LDAP is being used, and all accounts are local ...
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1answer
46 views

Recovering from a 'corrupt' theme installation on Debian

I recently installed a new theme on my Debian Stretch machine, however after rebooting, I am unable to get past the login screen. If I enter the incorrect log in details, the systems tells me that the ...
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votes
1answer
32 views

Scientific Linux 7x - Too much system hardening!

Some Linux users like my company build Linux servers to use on factory production lines. We write software to load BIOS and FLASH memory and test our products. We constantly need to reboot these ...
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0answers
19 views

Do display managers like sddm actually set the login_shell option?

I have a script which distinguishes if it is sourced from within a login shell or not. But it happens not to do its job as the login was done through display manager sddm. #!/bin/bash # /etc/bash....
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1answer
100 views

On Kali, by default terminal starts with root privileges, how to stop that? [duplicate]

On other distros when I open terminal, it is usually either ask for password or logs in with normal user priviliges, in Kali it logs on automatically with root. I want to stop that.
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1answer
154 views

CentOS 7 “Invalid user __ from xx.xx.xx.xx port xxx” - Not showing the attempted username entered

When taking a look into my /var/log/secure logging file, I'm able to see attempts to log into my CentOS system via SSH, however, the username is blank. I've recreated this myself by entering false ...
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0answers
160 views

Cannot login with Linux Mint 19 via terminal

I cannot login via terminal (I do not know if this is because of Mint or Ubuntu). When I enter the username, I want to enter the password, but what it does, it autoenters with an enter it goes like ...
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1answer
204 views

Login loop Linux Mint 19.1

I am unable to login to my linux desktop since I rebooted earlier today. Did not notice anything strange except firefox crashing a couple of times. It seems like the system is in a login loop. After ...
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0answers
172 views

TTY Login hangs after username input with constant newline

Problem: After a restart my Ubuntu Server 18.04 installation greets me as usual with the tty1 login prompt. The input of the username works as usual but after hitting enter the password prompt is ...
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0answers
47 views

login not working from new tty but with su <username> works

I'm installing LDAP auth on CentOs7 (command-line way). I'm facing a strange behaviour: [root@client]# su ldapuser01 (run as root) works and let me connect as ldap user (without prompting for a ...
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1answer
217 views

SSH connection “This account is currently not available”

I tried to connect at a SSH server in 3 different ways, but nothing works: using putty - after I enter my password the putty window automatically closed, and in the log file there is: "This account ...
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0answers
24 views

Can't boot into a specific account on GalliumOS, can with root account, from greeter

I was trying to log into my main administrator account, and it seems to accept my username & password and begin to login normally, as the standard (for me) blank purple screen pops up, but then it ...
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0answers
16 views

xscreensaver - how to log successful logins

I would like to log successful login attempts from screensaver. Running xscreensaver with xscreensaver -verbose -log ... does give me something usable: input finished. pam_conversation (...) ==&...
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2answers
55 views

do incorrect usernames get logged?

i was wondering if a GUI login attempt with a non existing username will be written to any log files? (im using mint with cinnamon and Kali with gnome3) I accidentally put my password in as username ...
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0answers
42 views

!! versus * in /etc/passwd [duplicate]

My (admittedly dated) understanding of unix is that in /etc/passwd if the second field is 'x' then the identity can login with a passwd that matches a hash found in /etc/shadow. However, when I list /...
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1answer
214 views

Kali-linux default password for live session [duplicate]

I tried to install kali through Unetbootin but it failed. After that, I tried to go on live one, but without setting any password. It asked for that as default. I entered root as username but don't ...
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0answers
44 views

I have issues when I login the shell of Debian 9

When I write my user and password it goes all fine until I push the enter button. The screen goes grey, blinks a few times, again grey, then freezes like that. So I push the reset buton and when its ...
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62 views

Cannot login in to arch linux

I installed arch a day ago and it was fine until yesterday but after I changed some settings in the /etc/pam.d/system-local-login to use fingerprint login and reboot, I can't login in to arch linux. ...
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0answers
17 views

How to login and Download the file in the same session in R language?

I am trying to do login and download the file with using a package httr and jsonlite in R language. I write the following code : library(data.table) library(jsonlite) library(httr) library(properties)...
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1answer
69 views

Can't login as user

Everything works as root. I can startx, and get into iceWM. I'll be using i3, but that works aswell through lightdm if I login as "other" then write "root". Loging in in a TTY works aswell, but only ...
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1answer
32 views

Login script that requires user to re-enter displayed random number string

I currently have a script that runs upon a user logging into a Linux server and at the end it prints [Terms of use agreement prints here] read -p "Agree and continue..." -nl -s However, most users ...
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3answers
124 views

PAM doesn't block my account after 5 failed logins

I would like to block account after 5 failed password on login screen. I follow this article but it doesn't takes effect. I don't know why. This is the content of my /etc/pam.d/system-auth file : #%...
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2answers
38 views

Use Key Based Login on Desktop Linux

I'm using Pop!_OS (essentially ubuntu + tweaks with a gnome environment) and I've recently acquired a Mooltipass hardware password manager. This tool has the capability to manage SSH keys. I was ...
1
vote
1answer
44 views

Why calling agetty directly from bash doesn't seem to have any effect?

I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, ...
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0answers
43 views

What is the “login session” of a process? [duplicate]

In the manpage of ps lsession SESSION displays login session identifier of a process. What does the "login session" of a process mean? ps has other fields cgname and cgroup for the cgroup ...
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0answers
600 views

Linux Centos does not boot on login GUI

I would like to boot my Linux Centos 7 on Graphic User Interface login page but it doesn't. I have already installed GNOME DESKTOP. I did: systemctl set-default graphical.target my grub file is ...
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votes
1answer
161 views

What does `lightdm --session-child 12 19` mean?

What does lightdm --session-child 12 19 mean in the following output? Why does lightdm fork a process to execute the above command? I don't find --session-child in lightdm manpage. Thanks. $ pstree ...
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vote
1answer
90 views

What is logging in?

From https://unix.stackexchange.com/a/489913/674 Logging in is a user-space construct; the kernel doesn’t care about that. There are multiple examples of this; for example, cron jobs can run ...
3
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2answers
107 views

How does `sshd` perform logging in activity?

From https://unix.stackexchange.com/a/489913/674 connecting using SSH counts as logging in. From How can I run a process as its owner or become its owner without logging in? connecting with SSH,...
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0answers
32 views

Cannot log in to ubuntu after modifying .profile file

I modified .profile file, by adding some PATH to a program to it. I now cannot login to my ubuntu os. I tried to access via ctrl + alt+ fn but the console does not recognize any command I type. It ...