while successful login reporting a error   actual source code
129
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them?  What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely?
115664
It asks for login profile name and then password. Is it some kind of problem or it looks that way?
46250
Is there a way I can do what stated in the title from the terminal commands, or will I have to look into the codes?
66554
I already used Limit Login Attempts wordpress plugin. Are there other ways to prevent brute force attacks?  I'm worried because I saw a lot of locked out.
11710
This started to happen immediately after I had rebooted the first time after doing a system upgrade. It first starts with a dialogue that says "System program problem detected". Then when I try to hit 'report problem' not much happens. I am led through a dialogue that always ends up the problem cannot be solved.  I am aware this is not a lot of information, however I'm not sure which information I need to publish and how should I obtain it to debug this problem.  Here's a screenshot!
45687
Apparently, for some reason, . I got this notice while logging in with Disqus, but not with Stack Exchange.  So... is Stack Exchange going to be affected by this? Do I need, or want, to add extra login methods to my Stack Exchange account to ensure I can still log in come April?
3428
I am getting sudo errors, how do I fix this error?  sudo: /etc/sudoers is mode 0777, should be 0440 sudo: no valid sudoers sources found, quitting
8617
I see an empty drop down box where the language code of the  should be.  To reproduce the bug: Lock screen or log out and log in again.    I also get the same behavior on the lock screen at the time when I try to log in with my password:    After I tried the workaround (below) the language code on the login screen disappeared as soon as I typed the first character of my password.  Workaround (not permanent): Switching with keyboard (Super+space) or mouse.  System info: Ubuntu 18.04.1 LTS, GNOME 3.28.2.    Please  if also affects you.
64483
Given a string "filename.conf", how to I verify the extension part?  I need a cross platform solution.
60853
For context: This is a desktop application interacting with a service running on W7.  I'll try and leave all the technical details out of this, but here goes:  Part of my application has to send a large amount of data to the server which is then validated server side. Any errors found are sent back to the client to handle.  My 'problem' is that this large amount of data (in this case, a person) can have a lot of things 'wrong with it' which can be summarised into two main errors:   Required fields not being filled in. (Name not provided) Data being entered but still invalid due to a business rule (person is under the age of 18, phone number entered as ABC123, assessment was completed, but no completion date was entered, etc.)   Now even with all the client side validation I can put in, there still might be cases when a number of errors that aren't detected. (business rules, mostly) How should these errors be displayed to the client? I only see three real options here:   Displaying the server side errors into the UI somehow. I'd like to avoid this possible since I'm not 100% sure on how to code this without writing a mass of spaghetti code to determine which error is for which field. List one error at a time. When a user submits the data, show the first error that is returned and ignore all the others. When the user resubmits, shows the next one, and so on. I have a feeling this could annoy some people who will probably send me angry emails along the lines of 'Why don't you show me all the errors at once?!?!?' Show them all at once. I could have all the errors showing at once, but this is going to cause a few problems:   The dialog box should potentially be huge if they've somehow got 15 or so errors. No one is going to remember all 15 problems unless they screenshot the message or write them down. The API on Windows might not allow me to fit all message in one dialog leaving users to click through an unknown amount of dialogs.    How should I approach this?
28319
How can I detect that my .NET application has crashed, and then restart it?
98394
How can I script a bat or cmd to stop and start a service reliably with error checking (or let me know that it wasn't successful for whatever reason)?
113341
How to show the message "hello $username, today's date is $date" as soon as you login to Ubuntu.
105633
I am stuck in a login loop because of this error.  I've seen a few threads about this matter but none helped.  I do Ctrl+Alt+f2, when I log in it shows me two errors:  -bash: /home/imight/.profile: line 19 unexpected EOF while looking for matching -bash: /home/imight/.profile: line 22: syntax error: unexpected end of file
100372
As a sysadmin I sometimes face situations, where a program behaves abnormally, while not creating errors at all or creating nonsense error-messages.  In the past - before java came in - there were two counter-measures:   If nothing else helps - RTFM ;-) If even 1. does not help - trace the system-calls and see what is happening   I usually use strace -f for this task with Linux (other OS have similar trace-tools). Now while this usually works well for any old-fashioned program, the trace gets very fuzzy when doing the same on a java-process. There are so many system-calls seemingly unrelated to any real action, that it is terrible to search through such a dump.  Are there better ways to do that (if the source-code is not available)?
64178
Lately, I've been trying to create a Bash script to capture a webcam photo when a fail attempt to login is registered. First of all, I found 2 guides related to this (links at the end), they explained how to create script etc.. It was going pretty good until I noticed my System (Archlinux, Fresh installation) doesn't have PAM's common-auth file. I've checked the entire /etc/pam.d/ directory and still can't find the file or a file with same contents.   My Script so far:  #!/bin/bash  # Let's watch our thief's face n.n   ts=$(date +"%m_%d_%Y_%H_%M_%S")  ffmpeg -f video4linux2 -s vga -i /dev/video0 -vframes 3 /home/haoa2/Logins-Fail/login-$ts.jpg  exit 0   My /etc/pam.d/ directory contents:  chage, chfn, chgpasswd, chpasswd, chsh, groupadd, groupdel, groupmems, groupmod, login, newusers, other, passwd, polkit-1, rlogin, rsh, shadow, slim, su, sudo, su-l, system-auth, systemd-user, system-local-login, system-login, system-remote-login, system-services, useradd, userdel, and usermod  , and a .  (Note: I know there is a related answer out there, but this quetion is more about the PAM's file rather than Scripting.)
15938
What do the result codes in SVN mean? I need a quick reference.