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VM Ubuntu: What are /dev/mapper and /dev/sd1?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 1974 / 3 Years ago, mon, october 4, 2021, 1:44:24

I want to increase the free disk space of my VM Ubuntu (host = Mac 10.10).
After autoclean -> auto remove, I still 80% (=5.7/7.5 GB)of space used in /dev/mapper, however, only 3% (=7.2/246.8 MB) used in /dev/sda1.

Could anyone explain me what are /dev/mapper and /dev/sda1, and their relation with the base memory (=2000MB) of my VM? And how to even increase the free space?

Thank you for any help!

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luringdge

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2 Years ago

answered 3 Years ago anxietunnel · Accepted Answer

Altough this doesn't fully address the question, in order to free up some space I suggest you to first remove the installed packages that are not needed anymore:

sudo apt-get autoremove --purge

Then you can clear the /var/log folder, which is extremely prone to grow in size over time, expecially if something at some point didn't work perfectly:

sudo rm -rf /var/log/*

Then you can use this command to list all your files/folders sorted from the smallest file/folder to the biggest file/folder, in order to quickly spot which files/folders are the biggest so you can possibly free up some additional space:

du -ahd <n> / | sort -hr

Where <n> is a number higher or equal to 0 representing the depth of the search.

3 should be a number large enough to narrow down the search a bit without having to deal with an excessively large list of files/folders.