If the system is genuinely hung 100%, completely frozen, and responds to nothing, there is but one solution left press the RESET button on the computer case, or turn it off completely and then restart. Note that the CTRL+ALT+DEL sequence may also work on some Linux systems, so try it too. The remainder of this article will focus on Linux only. On Windows, you could try CTRL+ALT+DEL which will hopefully bring you back to a Windows shortcut screen from where you can select Task Manager to start investigating if there is any hung process, etc. However, you could still try – on a Linux system – CTRL+ALT+F4 (more on this later) and CTRL+ALT+BACKSPACE (On some Linux systems this will reset the desktop/GUI completely) to see if it makes any difference. If the answer to both questions is “no change,” the system is highly likely completely frozen. If the complete system hangs (press the NUM LOCK and/or CAPS LOCK keys a few times does the lights still come on the keyboard indicating their turned on/off? Similarly, move the mouse around on the screen is it stuck? If you see many, it will be easy to analyze computers from others, even with limited information like during remote phone support. The more system hangs you see, the more you will recognize when they happen again. It is a bit of an art, or perhaps better a skill, which will grow over time. One of the main difficulties with system hangs is finding out what is causing the hung. $ – requires linux-commands to be executed as a regular non-privileged user # – requires linux-commands to be executed with root privileges either directly as a root user or by use of sudo command Requirements, Conventions or Software Version UsedĪny utility which is not included in the Bash shell by default can be installed using sudo apt-get install utility-name (or yum install for RedHat based systems) Hung Linux System? How to Escape to the Command Line and More Software requirements and conventions used Software Requirements and Linux Command Line Conventions Category
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