LPI Exam Questions

How can a journal added, non-destructively, to the ext2 file-system on /dev/dg/lv05?

How can a journal added, non-destructively, to the ext2 file-system on /dev/dg/lv05? Please
enter the command with all parameter(s):

A.
tune2fs -j /dev/dg/lv05

Explanation: