This article explains tail command with most common options. The linux tail command does something like its name. It displays the last few lines of a file. It is mostly used for viewing log file updates as these updates are appended to the log files.

With a file name as argument, it displays last 10 lines for that file	tail file1.txt
If you do not want to print the headers, you can use quiet mode with -q or –quiet or –silent option.	tail -q file1.txt
Print last K number of lines	tail -3 file1.txt
View a growing file to check some changes being made at the end of the file	tail -n3 -f file2.txt
terminate after some process with Process ID PID dies with –pid=PID option.	tail -f file2.txt –pid=4309
Filtering the tail output with grep	tail -f file1.txt | grep ‘pattern’