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So I`m using ubuntu 18.04 LTS almost on every machine that I use in my lifetime.. WHether for programming, storing sensitive information, financial transaction, entertainment so on and so forth!!..

so let me know is it possible (for hackers) to invade and get access over the files and data of my hard drive (every hard drive is encrypted during installation itself)

is there any other way in Linux to master encrypt (encrypt entire hard drive) for non-OS partitions and drives?..

Also, asking basic question, why it`s not possible to change encrypted passwords after installing OS?.

marked as duplicate by karel, Kulfy, Fabby, Thomas, mook765 Jul 14 at 19:35

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so let me know is it possible (for hackers) to invade and get access over the files and data of my hard drive (every hard drive is encrypted during installation itself)

Yes. Disk encryption protects data at rest. It's of no use if an attacker gains access, e.g. via malware or security issues in software. It's also only as good as the master key.

is there any other way in Linux to master encrypt (encrypt entire hard drive) for non-OS partitions and drives?

Sure. Truecrypt/Veracrypt, dm-crypt and luks are all different ways of doing this. But as far as I'm aware all are rather secure.

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