Is it possible to partition a hard drive without formatting in linux?

Question

linux

There is a web server running ubuntu server
. It has 1 terabyte of space, and it haunts me.

I want to split the partition with the main file system into two, so that there is one more partition.
I want to make a network drive out of it - a file washer.

So, the questions are:
1. Is it possible to do this so as not to overwrite the existing files on the partition?
2. In which direction to google?
3. What file system to choose to freely use with Mac\Windows\Linux and store files of 4-6 GB?!

Answer 1

1, 2. You can. The easiest way is to boot from ubuntu desktop live cd, run gparted, it's very easy to reduce the partition in it.
3. I don't know about poppy, but for win/lin I use ntfs. In Ubuntu, it works perfectly, the only negative is that octal rights are not supported. But for ordinary user files, this is not critical.

Answer 2

1.2. you can - resize2fs, first you need to resize the partition through parted or fdisk, and most importantly, do not make a mistake with free space.
3. I would make ext3, if it is a samba / ftp-ball, then for clients it makes no difference which FS.

Answer 3

Initially it was necessary to use LVM. In principle, you can take a second disk of the same kind, split it as you like - transfer partitions, prescribe the correct mounting of the new fstab disk and replace the disk.