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So, I just realized that my root partition which is 50 GB, only has 6 GB free space.

p.s: I have separate root and home partition, my home partition is 180 GB and I have a 1TB HDD drive too which I use for my most of my big files.

Should I do anything? like resizing or anything(just guessing), or it has enough space?

edit: I've never saved personal files on my root partition

second edit: So I did a scan on the partition and here's how is my root partition that big

I have 26 GB on /var (21 GB on /var/lib, 20 GB of it on /var/lib/snapd and on snapd, 14 GB is on /var/lib/snapd/snapshots) and 5 GB on /var/log)

and 14.1 GB on /usr (8 gb on /usr/lib and 4 gb on /usr/share)

these were the big files

Parsa
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    Find out what is taking so much disk space. See e.g. https://askubuntu.com/questions/17467/what-is-taking-up-so-much-space-on-my-disk-beside-the-filesystem – pLumo Apr 13 '21 at 12:25
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    In all my years of using Ubuntu my root never exceeded 20Gb. You seem to have personal(?) data on / and outside of /home so the free space will increase. Find the cuprit and fix the issue. Do start out with /var/log/ maybe it has a very large log file with errors you neglected ;-) – Rinzwind Apr 13 '21 at 12:25
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    We can't know as we have no details. You've mentioned two partitions (/ & /home) but mention only one size (50GB so we don't know if that's 50GB each, combined or a combination). Your question as provided is vague & unclear. My system has 26GB & 27GB for / & /home & I live with it and have done so for years (7 *release-upgrades* so far) and 6GB free space to me seems huge! & I'm jealous) but I spend a lot of time ensuring my system keeps running (ie. high maintenance due to my lack of disk space...) so it's a decision of time vs space (& of course how we use our systems; I wish I had 32GB) – guiverc Apr 13 '21 at 12:25
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    In addition to pLumo's link: https://askubuntu.com/questions/1263276/list-files-and-folders-of-the-root-partion/1263327#1263327 & https://askubuntu.com/questions/1263276/list-files-and-folders-of-the-root-partion/1263327#1263327 – oldfred Apr 13 '21 at 12:39
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    @oldfred that is two times same link ;-) – pLumo Apr 13 '21 at 12:41
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    So what takes up so much space in `/var/lib`? Might be `/var/lib/snapd/`? That is where the snap packages are installed to.... If so , check output of `du -h /var/lib/snapd/snaps/*`... – pLumo Apr 13 '21 at 13:01
  • @pLumo yes you are right, there's 20GB in snapd. I checked the output of that command, its a total of 2.3 GB of 100,200, <100 files ,also, 14GB of snapd is in snapshots and 3GB in cache – Parsa Apr 13 '21 at 13:08
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    So. Remove some `snap` packages you don't need anymore. Also, you have snapshots of `snap` packages. Automatic snapshots is disabled in Ubuntu. Either you made snapshots manually or you enabled the feature. Check with `snap saved`. – pLumo Apr 13 '21 at 13:10
  • @pLumo auto snapshots or something, but anyway turned it off in case it have been on. just a question, is there any special command to delete snapshots? and one another last thing, the total of snap saved is 8GB, so after I clean it, root will be something around 35GB, is that a normal amount? – Parsa Apr 13 '21 at 13:22
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    It is not possible to say if 35GB is a normal amount or not. My root is 13 GB, but I don't have wine, no docker, my virtual machines folder is symlinked to another disk, I periodically purge old kernels, I completely purged snaps... According to the apps you use your 35 GB may be normal as my 13 GB are. – Lorenz Keel Apr 13 '21 at 13:28
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    big thanks everybody, problem solved, I guess I just edit the post title to a proper one and mark as duplicate – Parsa Apr 13 '21 at 13:35
  • just forgot to add answer before marking az duplicate, for anyone visiting new, The problem was mostly my `/var/lib/snapd/snapshots` , it seemed like i had turned on automatic snapshots or I made them manually. anyway, i deleted them with `snap forget` command. – Parsa Apr 13 '21 at 13:42

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