I cleared up a space on the C drive and installed Linux on that partition. Can Windows see files in my Linux partition?
When i installed Linux, i didn’t encrypt it but it is password protected. Thanks
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Theoretically Yes, if your Linux partition is not encrypted, any OS can read it. Password protecting it doesn’t do anything to conceal your data, just keeps people from logging into your system while Linux is booted. If this is a security / privacy related question, there is nothing to stop a program running under Windows from reading the data on your Linux partition except
Practically No, depending on the filesystem you chose (if you went with the default, it’s likely ext4 but could be something more exotic). Out of the box Windows lacks the software / drivers to read most Linux filesystems. If this is a “can I access my files” question, you probably need to install something like this to read your data from Windows. Note that the reverse is not true. Most distros other than light weight distros like Alpine are perfectly able to read the NTFS file system out of the box. Sometimes they can’t write to it unless you install additional tools (like OOTB Debian probably can’t, but I’m pretty sure OOTB Linux Mint can if you change a setting and IDK about OOTB Ubuntu / Fedora / Arch).
The easiest way to share data between Windows and Linux is with a 3rd partition formatted to FAT32, as both Linux and Windows have no problem reading from / writing to it without additional software.
EDIT: The other poster is absolutely correct. The modern way to do this is with exFAT. What can I say? I’m a crusty old engineer.
It’s very likely that adware / spyware / malware targeting Windows users will NOT be able to read Ext4 or other Linux filesystems, unless it’s specifically targeted to do so, so you do have that added “security through obscurity” protection.
exFAT is also pretty solid for this purpose and doesn’t have the file size limitations that FAT32 has.
I Lost tons of data thanks to windows fast boot flushing back the old fat after rebooting to windows. Never anymore. Linux can write to NTFS , it’s much more reliable. Plus the default block size for exfat (when formatted from Windows) is huge
There is also nothing to prevent anyone to just run some live Linux from USB, so consider data on that Linux partition neither secure, nor private
I remember being really surprised when I learned this lol. My SO had an old Windows work laptop that they’d forgotten the password for, and just out of curiosity I tried running a live Linux USB to see if we could access anything, and discovered that we could see everything from every user on there, and that login passwords really didn’t do anything at all. It was a real “we should encrypt all our drives” moment.
True but then you actually have to remember the password. Or you can use an USB key to store keyfile or a hardware security key like Nitrokey or Yubikey to decrypt it.
I would say think twice whether you really need it. Encryption is another technological layer that can fail, so it is double edged sword and encrypting something “just to be on the safe side” might not be the best thing to do.