How do you use the tail command on a Mac?

How do you use the tail command on a Mac?

How to Use the Tail Command

1. Enter the tail command, followed by the file you’d like to view: tail /var/log/auth.log.
2. To change the number of lines displayed, use the -n option: tail -n 50 /var/log/auth.log.
3. To show a real-time, streaming output of a changing file, use the -f or –follow options: tail -f /var/log/auth.log.

What is tail command in Mac?

Display the last part of a file. Display the contents of file or, by default, it’s standard input, to the standard output. The file is closed and reopened when tail detects that the filename being read from has a new inode number. The -F option is ignored if reading from standard input rather than a file.

What does tail do in terminal?

The tail command is a command-line utility for outputting the last part of files given to it via standard input. It writes results to standard output. By default, tail returns the last ten lines of each file that it is given. It may also be used to follow a file in real-time and watch as new lines are written to it.

How does tail work in the command line?

Pass the filename on the command line and use the -f (follow) option. As each new log entry is added to the log file, tail updates its display in the terminal window. You can refine the output to include only lines of particular relevance or interest.

How can I have tail work on multiple files at once?

You can have tail work with multiple files at once. Just pass the filenames on the command line: A small header is shown for each file so that you know which file the lines belong to. The + (count from the start) modifier makes tail display lines from the start of a file, beginning at a specific line number.

Where do I find the terminal on my Mac?

On your Mac, do one of the following: Click the Launchpad icon in the Dock, type Terminal in the search field, then click Terminal. In the Finder , open the /Applications/Utilities folder, then double-click Terminal.

What does the prompt mean in MAC Terminal?

Each window in Terminal represents an instance of a shell process. The window contains a prompt that indicates you can enter a command. The prompt you see depends on your Terminal and shell preferences, but it often includes the name of the host you’re logged in to, your current working folder, your user name, and a prompt symbol.