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Using head and tail for printing the last or first 10 lines
When examining a large file, thousands of lines long, the cat command, which will display all the line,s is not suitable. Instead, we want to view a subset (for example, the first 10 lines of the file or the last 10 lines of the file). We may need to print the first n lines or last n lines or print all except the last n lines or all except the first n lines, or the lines between two locations.
The head and tail commands can do this.