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How did my usb change from ext4 to FAT format without me changing it?

I formatted a brand new sandisk usb to ext4 in ubuntu 18.04.2. I have been alternating its use between ubuntu 18.04.3, 64-bit, and debian 10 / armbian, 32-bit. I have been adding files to it until ...
5
votes
1answer
84 views

Renaming a file while it is being written

I'm wondering if this is considered safe. I know the file handles work just fine as long as a link remains, and I know the identifier is the inode rather than the name, but I am not sure how it works ...
-1
votes
2answers
861 views

Why can't Windows read Linux filesystems? [closed]

When playing with filesystems and partition, I realized that when I created a ext file system on my USB drive and plug it to Windows, I am forced to format it. On the other end, when building a FAT ...
2
votes
1answer
251 views

Sizing a disk image/filesystem to hold exactly a certain set of files with near-zero free space

I need to construct, in code suitable for scripting/make/automation, a disk image (two partitions, a FAT filesystem and an ext4 filesystem, for UEFI/Syslinux USB Linux booting [OS installer], which ...
1
vote
0answers
447 views

Howto configure autofs to work with usbsticks formatted with differend filesystems

I have some USB-sticks using fat32 as filesystem and others using ext4. Now I want to configure autofs to mount the sticks automatically. To make sure that the user can write to fat32 sticks I use ...