While having coffee at home I decided to put this table together regarding Linux File Systems and their differences. Let me know if I’m missing something.

Ext2Ext3Ext4
Stands for Second Extended file system.Stands for Third Extended file system.Stands for Fourth Extended file system.
Introduced in 1993.Introduced in 2001.Introduced in 2008.
This was developed to overcome the
limitation of the original ext file
system.
Starting from Kernel 2.4.15 ext3 was available.Starting from Kernel 2.6.19 ext4 was available.
Does NOT have journaling feature.Allows journaling.Supports huge individual file size and overall file system size.
Maximum individual file size can be from 16GB to 2TB.Maximum individual file size can be from 16GB to 2TB.Maximum individual file size can be from 16 GB to 16 TB.
Overall ext2 file system size can be
from 2TB to 32TB.
Overall ext2 file system size can be
from 2TB to 32TB.
Overall maximum ext4 file system size is 1 EB (exabyte).

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