`tail` is a command line tool used to view the end of a file. It is often used to view the end of log files or other large text files.
Examples
1. Output the last few lines of a file
tail file.txt
2. Output a specified number of lines from the end of a file
tail -n 20 file.txt
3. Track changes to the file
tail -f file.txt
4. Output the process ID of the last process that modified the file
tail --pid=1234 file.txt
5. Start output from a specified position
tail -s +10 file.txt
6. Sleep for a specified number of seconds between each output
tail --sleep-interval=5 file.txt
The following is an example using the -s parameter. This command will output starting from the 3rd line of the file.
tail -s +3 file.txt