Simple Linux Command line file text manipulation tips

This is going to be short and straight to the point.

Use cat file.txt to display the content of file.txt on the screen

Use cat file.txt | more to display the content of file.txt one page at a time

Use cat file.txt | less to enable scrolling. Press q to exit/end.

Use tac file.txt to display the content of file.txt in reverse

Use cat file1.txt > file2.txt to copy content of file1 to file2, file duplication.

Use cat file1.txt >> file2.txt to append content of file1 to file2.

Use tail -10 file.txt to display the last 10 lines in file.txt

Use head -10 file.txt to display the first 10 lines in file.txt