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login - Can't log in on Ubuntu 20.04 - Ask Ubuntu
- https://askubuntu.com/questions/1231410/cant-log-in-on-ubuntu-20-04
- The answer from Jonathan Lisic above was the most helpful of the many that I have had to go through today. This is a new Login Loop problem, and yes it does appear that the latest NVidia drivers on 20.04 LTS actually block the progress from Login Screen to the Desktop Screen if Automatic Login is active.. The editing using nano works, but I used Ctrl-O then Ctrl-X to save and exit, (as Ctrl-S ...
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Ubuntu: Log in problems after running updates | Dell US
- https://www.dell.com/support/kbdoc/en-us/000129836/ubuntu-log-in-problems-after-running-updates
- Start up Issues at login seen after running system/driver/software updates in Ubuntu? Are you seeing start-up issues? Such as Black Screens, the computer fails to boot, it loops at the login screen after performing computer, driver, or software updates. The next section will take you through using recovery mode in Ubuntu.
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Troubleshooting with Linux Logs - Log Analysis
- https://www.loggly.com/ultimate-guide/troubleshooting-with-linux-logs/
- If we want to find out which user accounts have the most failed logins, we first need to extract the user name from the auth log. We'll use the grep, cut, sort, and uniq commands to do this. Grep returns lines containing "invalid user", cut extracts the usernames, sort orders the list of names, and uniq counts the number of unique names:
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[Solved] System Program Problem Detected in Ubuntu
- https://itsfoss.com/how-to-fix-system-program-problem-detected-ubuntu/
- For the last couple of weeks, (almost) every time I was greeted with system program problem detected on startup in Ubuntu. I ignored it for sometime but it was quite annoying after a certain point. You won't be too happy as well if you are greeted by a pop-up displaying this every time you boot in to the system: System program problem detected
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Ubuntu Tips: How To Enable Root User ( Super User ) in Ubuntu - The Geek Stuff
- https://www.thegeekstuff.com/2009/09/ubuntu-tips-how-to-login-using-su-command-su-gives-authentication-failure-error-message/
- Question 2: How do I login to Ubuntu directly using root account? First, you should allow the root user to be logged in from the X as explained below. Step 1: Go to System -> Administration -> Login window. Step 2: In the Security tab, click on the check box "Allow local system administrator" as shown below.
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X/Troubleshooting/BlankScreen - Ubuntu Wiki
- https://wiki.ubuntu.com/X/Troubleshooting/BlankScreen
- If it occurs *after* entering your password on the login page, you have some different class of issue, such as an issue with 3D / DRM. Try disabling compiz ( sudo chmod a-x /usr/bin/compiz ), logging in as a different user, or turning off DRI. How It Works
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How to Find All Failed SSH login Attempts in Linux - Tecmint
- https://www.tecmint.com/find-failed-ssh-login-attempts-in-linux/
- Make sure that these commands are executed with root privileges. The most simple command to list all failed SSH logins is the one shown below. # grep "Failed password" /var/log/auth.log List All Failed SSH Login Attempts The same result can also be achieved by issuing the cat command. # cat /var/log/auth.log | grep "Failed password"
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Security notices | Ubuntu
- https://ubuntu.com/security/notices
- Ubuntu Security Notices Developers issue an Ubuntu Security Notice when a security issue is fixed in an official Ubuntu package. To report a security vulnerability in an Ubuntu package, please contact the Security Team. Latest Notices USN-5378-4: Gzip vulnerability › 13 April 2022 Gzip could be made to overwrite arbitrary files. CVE-2022-1271
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How to Fix an Ubuntu System When It Won't Boot
- https://www.howtogeek.com/196740/how-to-fix-an-ubuntu-system-when-it-wont-boot/
- Use the arrow keys to select the "Ubuntu … (recovery mode)" option in the submenu and press Enter. GRUB will boot your Ubuntu system in a very minimal recovery mode menu, skipping the majority of the system services and all the graphical applications that load. It will even load your file system in a safe read-only mode.
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12 Critical Linux Log Files You Must be Monitoring
- https://www.eurovps.com/blog/important-linux-log-files-you-must-be-monitoring/
- This log file can provide detailed insight about unauthorized or failed login attempts Can be very useful to detect possible hacking attempts. It also stores information about successful logins and tracks the activities of valid users. /var/log/boot.log What's logged here?
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Viewing and monitoring log files - Ubuntu
- https://ubuntu.com/tutorials/viewing-and-monitoring-log-files
- Viewing and monitoring logs from the command line Conclusion 1. Overview The Linux operating system, and many applications that run on it, do a lot of logging. These logs are invaluable for monitoring and troubleshooting your system. What you'll learn Viewing logs with a simple GUI tool Basic command-line commands for working with log files
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How to View System Log Files on Ubuntu 20.04 LTS - VITUX
- https://vitux.com/view-system-log-files-ubuntu/
- Open the Ubuntu Terminal and type the following command: $ logger "This is a custom message" At the end of the above log list, you can see the custom log message displayed in the graphical log file viewer. You can also use the logger command within a script for providing additional information.
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Reset a lost password on an Ubuntu VM (Example) - Coderwall
- https://coderwall.com/p/vibura/reset-a-lost-password-on-an-ubuntu-vm
- Boot it and hit Shift. Now you should be in Grub. If you don't get it, don't worry, just shut down and try again. Choose the 'Advanced Options' and then any of the "recovery" lines from the Grub menu for Ubuntu. You'll get dropped into another menu system. Choose 'root': this is the single-user mode where you are root.
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How to Install and Correct Dependencies Issues in Ubuntu - Liquid Web
- https://www.liquidweb.com/kb/how-to-install-dependencies-in-ubuntu/
- Option 1: Enable all Ubuntu Repositories. Utilizing this option will allow for a wider base of software and dependencies to pull from. Then, once this is updated, we can try to reinstall the software.
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Reset Lost Password Of Ubuntu Virtual Machine • TechVorm
- https://techvorm.com/reset-lost-password-ubuntu-virtual-machine
- First, mount the root (/) file system as read-write by typing in (no need for sudo ), mount -rw -o remount / Once this is done, issue following command to reset password for the user (replace user_name with your username), passwd user_name That's about it. The system will ask for new password and once done, exit the terminal by typing, exit
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How to Check and Monitor CPU utilization on Linux - Linux ... - LinuxConfig.org
- https://linuxconfig.org/how-to-check-and-monitor-cpu-utilization-on-linux
- Think of these numbers as percentages - a load of 0.2 means 20%, and a load of 1.00 means 100%. That should be easy enough to understand, but you may also see load averages greater than 1.00. This is because load average is not a direct measurement of CPU usage, but how much "work" (load) your system is trying to process.
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Login | Loggly - Log Analysis | Log Management by Loggly
- https://www.loggly.com/login/
- Data analysis and reporting DevOps integrations Security Loggly for Enterprise Scale Log analysis for AWS Logs in customer support Splunk alternative Node.js Logging Sumo Logic alternative ELK Elastic Stack alternative
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How to Install and Configure Squid Proxy on Ubuntu 20.04 - Linuxize
- https://linuxize.com/post/how-to-install-and-configure-squid-proxy-on-ubuntu-20-04/
- Click on the ⚙ Preferenceslink. Scroll down to the Network Settingssection and click on the Settings...button. A new window will open. Select the Manual proxy configurationradio button. Enter your Squid server IP address in the HTTP Hostfield and 3128in the Portfield. Select the Use this proxy server for all protocolscheckbox.
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tcpdump Command in Linux with Examples - GeeksforGeeks
- https://www.geeksforgeeks.org/tcpdump-command-in-linux-with-examples/
- tcpdump is a packet sniffing and packet analyzing tool for a System Administrator to troubleshoot connectivity issues in Linux. It is used to capture, filter, and analyze network traffic such as TCP/IP packets going through your system. It is many times used as a security tool as well.
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7 Ways to Speed up Ubuntu - Make Tech Easier
- https://www.maketecheasier.com/four-ways-to-speed-up-ubuntu/
- You can solve this problem with BleachBit. 1. Install BleachBit with: sudo apt install bleachbit 2. Run Bleachbit from your apps menu. 3. Choose the types of files you'd like it to clean. We suggest everything under Apt, journald, and the Temporary files entry under Deep scan. 4. Click on Clean on the top left. 2.
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How To Set Up a JupyterLab Environment on Ubuntu 18.04 - DigitalOcean
- https://www.digitalocean.com/community/tutorials/how-to-set-up-a-jupyterlab-environment-on-ubuntu-18-04
- I ran into one problem with setting the password using jupyter notebook password the hash of which did not work for me, when setting to c.NotebookApp.password. Instead I used jupyter server password which worked. Ubuntu 20.04.2 LTS Jupyter Lab 3.0.14
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DebuggingKernelSuspend - Ubuntu Wiki
- https://wiki.ubuntu.com/DebuggingKernelSuspend
- In order to simulate your suspend/resume process, enter the following commands: sudo sh -c "sync && echo 1 > /sys/power/pm_trace && pm-suspend". At this point your computer should enter the suspend state within a few seconds. Usually the power LED will slowly flash when in the suspended state.
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User Management in Linux - GeeksforGeeks
- https://www.geeksforgeeks.org/user-management-in-linux/
- 1. To list out all the users in Linux, use the awk command with -F option. Here, we are accessing a file and printing only first column with the help of print $1 and awk . awk -F':' ' { print $1}' /etc/passwd. 2. Using id command, you can get the ID of any username.
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How to Install Rancher on Ubuntu 18.04 & 20.04 (Step-by-Step Guide)
- https://phoenixnap.com/kb/install-rancher-on-ubuntu
- The command above instructs Docker to run the container in detached mode and to keep it running (unless it is manually stopped). The server container is configured to listen to port 8080, but you can modify the port number according to your needs.. Docker should pull the latest Rancher image and launch the container.
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Check and Repair Your Filesystem With fsck [Linux] - Make ... - Make Tech Easier
- https://www.maketecheasier.com/check-repair-filesystem-fsck-linux/
- In Linux (and Mac), there is this powerful command " fsck " that you can use to check and repair your filesystem. "Fsck" stands for "File System Consistency checK". The usage is very easy. Open a terminal and type: fsck / dev / sda1. This will check the sda1 partition. Note: fsck cannot be used on a mounted partition.
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How to diagnose xrdp blank or black screen? - SourceForge
- https://sourceforge.net/p/xrdp/discussion/389417/thread/64949bc2/
- aptitude install nano. reboot computer. attempt remote login to desktop using the Windoze Remote Desktop & the remote computer's ip address (not the computer name) script for finding your ip address: ifconfig. If you cannot login remotely at this point, then login locally. Again try the Remote Desktop.
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Install Ubuntu on Oracle VirtualBox
- https://brb.nci.nih.gov/seqtools/installUbuntu.html
- Install Ubuntu. Back to Oracle VM VirtualBox Manager, click on the new Ubuntu virtual machine and hit 'Start' button. Now you shall see a 'Welcome' screen. Click 'Install Ubuntu' button. Note that the installation process may differ a little bit from version to version. The screenshots here are based on Ubuntu 14.04.1.
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