ext2隱藏屬性

append only(a), compressed (c), no dump (d), immutable (i), data journalling (j), secure deletion (s), no tail-merging (t), undeletable (u),
no atime updates (A), synchronous directory updates (D), synchronous updates (S), and top of directory hierarchy (T)

用lsattr、chattr指令來顯示與變更此屬性