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The finger command searches for user accounts and displays account information. It can search for user accounts and display details such as login name, full name, user's home directory, and last login time.

Eample:
$ finger john ←Search for users with the full name or login name "abc" and display relevant information
Login: amaz                             Name: abc kao ←Full name contains "abc"
Directory: /home/abc                    Shell: /bin/bash
Office: ABC Tech, 123                   Home Phone: 123456
Last login Wed Aug 29 14:55 (CST) on tty2
No mail.
No Plan.
$ finger xyz@abcd.com.tw ←Query remote login in the format "user@host"
[abcd.com.tw]
Login Name: xyz
Directory:/home/xyz     Shell:/bin/sh
On since Sep 5 05:33:12 on console
No Plan. 

For more options, usage, and examples of this command, please refer to the provided link.