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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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