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How to read start-up logs
(lemm.ee)
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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The dmesg command via either sudo or root can show a lot of that output. If your system did not have rsyslog or the syslog-ng packages installed any more then you'd only have systemd journal but you can, depending on your Linux distribution, install these logging applications. Back in the days when Linux users would not always use a graphical display manager, you could actually use shift and page up and page down to scroll through the kernel boot up messages.
Thank you.