Here's a useful video on the topic:

By default, it displays the last lines when used in the following form:

tail [filename]
tail -n 11 [filename]  -> Last 11 lines  
tail -c 20 [filename]  -> Last 20 characters  

We can also specify a certain number of lines to be displayed and list multiple filenames as well. It may also be used to display a specified number of bytes from an input file. Click here for more details about using the tail command.

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