The tail command is used to display the last n lines of a specified file. By default the tail command displays the last 10 lines of a file. This can be changed by using the -n argument and specifying a new value. If the specified file does not contain at least n lines then a the .bak version of the file will be prepended, if it exists.
Another powerful feature of the tail command is its ability to monitor and display file changes in real-time. The specified file in monitored for changes once a second and only the changed portion of the file is displayed.
How to Install tail
Below is an update project you can apply to your JNIOR to get the tail application.