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A lot of software uses
systemd-journaldto log errors, -
The bash shell saves everything you type into the terminal,
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wtmp, btmp, utmp all track exactly who is logged in and when,
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The package manager logs all software you install and keeps the logs after uninstallation,
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And the kernel writes part of the RAM which may contain sensitive information to the disk when your PC crashes.
While the OS isn’t sending these logs to Microsoft or Google, anyone who gets into your PC while you are logged in and your data is unencrypted can see much of what you have been doing.
If you want to be private, you must disable them.


This may be true, but if you disable a lot of the logging troubleshooting your PC will become hard or impossible and a lot of people like having a bash history. Its another convenience vs privacy compromise. So just be sure to know what you are doing as always. I doubt the average linux gamer will have to worry about this.