Путеводитель по Руководству Linux

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   ext4    ( 5 )

вторая расширенная файловая система (the second extended file system)

Атрибуты файлов (File attributes)

The ext2, ext3, and ext4 file systems support setting the following file attributes on Linux systems using the chattr(1) utility:

a - append only

A - no atime updates

d - no dump

D - synchronous directory updates

i - immutable

S - synchronous updates

u - undeletable

In addition, the ext3 and ext4 file systems support the following flag:

j - data journaling

Finally, the ext4 file system also supports the following flag:

e - extents format

For descriptions of these attribute flags, please refer to the chattr(1) man page.