Stevens Institute of Technology - Department of Computer Science

CS631 Week 04 Checkpoint

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Briefly describe the difference between a hard link and a symlink.

Create a directory and change into it. Then remove the directory from a different terminal session.
What happens when you then run e.g., ls -la or touch file from the first terminal? Why?

What's the difference between /etc/passwd and /etc/master.passwd?

Suppose you forgot your password, but have access to your password hash, e.g., '$sha1$23812$mrnfA20a$K5UKbcAnLTlBDOszhYsruk8WOVOg'.
How do you get back your password?

Which element in the struct stat describes the file creation time?

Find out whether there will be a leap second at the end of this year.