Use the -F option
In order to create a link to a directory you must use the -F option.
whatis
The whatis command displays a summary line from the man page for the specified command in Linux.
which
The which command searches your path until it finds a command that matches the command you are looking for and displays its full path in Linux OS.
zcat
The zcat utility allows you to examine the contents of a compressed file much the same way that cat displays a file.
5. Who owns the data dictionary in Linux?
The SYS user owns the data dictionary. The SYS and SYSTEM users are created when the database is created.
tail -15 dog cat horse
The tail utility displays the end of a file. The -15 tells tail to display the last fifteen lines of each specified file.