From a87514da97752ffbbcead48c504b64124012af66 Mon Sep 17 00:00:00 2001
From: gasts <gasts@users.noreply.github.com>
Date: Thu, 22 Nov 2018 05:05:52 +0100
Subject: [PATCH] Short description of unix tail (#22446)

A short description of unix tail
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 guide/english/bash/bash-tail/index.md | 37 +++++++++++++++++++++++++++
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+---
+title: Bash tail
+---
+
+## Bash tail
+Tail is a program to display the **tail** end of a text file. If no option is given, tail shows the last 10 lines of a given file.
+
+### Usage
+
+```bash
+tail [options] [file_names]
+```
+
+Most used options:
+
+* `-f`, display the last lines and then monitor the file. If new lines are added to the file, tail updates the display.
+* `-c NUM`, display the last `NUM` bytes of the file.
+* `-n NUM`, display the last `NUM` lines, instead of the last 10
+
+
+### Example
+
+To show the last 10 lines from file **log.txt**
+
+```bash
+tail log.txt
+```
+Show only the last line from file **log.txt**
+```bash
+tail -n1 log.txt
+```
+Show live changes from file **log.txt**
+```bash
+tail -f log.txt
+```
+#### More Information:
+* Wikipedia: https://en.wikipedia.org/wiki/Tail_(Unix)