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Can you tell me how to clean RAM on Ubuntu 18.04 LTS. My laptop almost full RAM when working, But when i closed applications, and nothing running, RAM not reduced. Why and how to resolved? Thanks for your help?

Nguyễn Đình Trường
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    Possible duplicate of [How to solve ram usage excessive on Ubuntu 18.04.2 LTS](https://askubuntu.com/questions/1134523/how-to-solve-ram-usage-excessive-on-ubuntu-18-04-2-lts) – steeldriver Apr 17 '19 at 23:15
  • @steeldriver no no. I want to ask about clean ram. Because, when i restart system, ram usage when no app using is about 1G. And after work, it is 2,7G or more than. i think can clean ram dont need restart. Do you know it? – Nguyễn Đình Trường Apr 17 '19 at 23:50
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    RAM is certainly used by applications. But it's also used as a file/disk cache. So RAM usage will always be higher after the system has been running for a while. Quite normal. No need to "clean" RAM. – heynnema Apr 18 '19 at 00:01
  • @heynnema i know that. But on Ubuntu 16.04 not like that. After work and close all apps, ram is about 1,5G. it is okay. Ubuntu 18.04 so excessive. So I think clean ram will be ok for system. – Nguyễn Đình Trường Apr 18 '19 at 01:44
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    If you **were** able to clean RAM, you'd be clearing out disk/file cache, and your performance would get **worse**, not better. Leave it alone. – heynnema Apr 18 '19 at 01:59

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