diff --git a/sources/tech/20171116 How to use a here documents to write data to a file in bash script.md b/sources/tech/20171116 How to use a here documents to write data to a file in bash script.md
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-translating by Flowsnow
-
-How to use a here documents to write data to a file in bash script
-======
-
-A here document is nothing but I/O redirection that tells the bash shell to read input from the current source until a line containing only delimiter is seen.
-[![redirect output of here document to a text file][1]][1]
-This is useful for providing commands to ftp, cat, echo, ssh and many other useful Linux/Unix commands. This feature should work with bash or Bourne/Korn/POSIX shell too.
-
-## heredoc syntax
-
-How do I use a heredoc redirection feature (here documents) to write data to a file in my bash shell scripts? [A here document][2] is nothing but I/O redirection that tells the bash shell to read input from the current source until a line containing only delimiter is seen.This is useful for providing commands to ftp, cat, echo, ssh and many other useful Linux/Unix commands. This feature should work with bash or Bourne/Korn/POSIX shell too.
-
-The syntax is:
-```
-command <<EOF
-cmd1
-cmd2 arg1
-EOF
-```
-
-OR allow here-documents within shell scripts to be indented in a natural fashion using **EOF <**
-```
-command <<-EOF
- msg1
- msg2
- $var on line
-EOF
-```
-
-OR
-```
-command <<'EOF'
- cmd1
- cmd2 arg1
- $var won't expand as parameter substitution turned off
- by single quoting
-EOF
-```
-
-OR **redirect and overwrite it** to a file named my_output_file.txt:
-```
-command << EOF > my_output_file.txt
- mesg1
- msg2
- msg3
- $var on $foo
-EOF
-```
-
-OR **redirect and append it** to a file named my_output_file.txt:
-```
-command << EOF >> my_output_file.txt
- mesg1
- msg2
- msg3
- $var on $foo
-EOF
-```
-
-## Examples
-
-The following script will write the needed contents to a file named /tmp/output.txt:
-```
-#!/bin/bash
-OUT=/tmp/output.txt
- 
-echo "Starting my script..."
-echo "Doing something..."
- 
-cat <<EOF >$OUT
-  Status of backup as on $(date)
-  Backing up files $HOME and /etc/
-EOF
- 
-echo "Starting backup using rsync..."
-```
-
-
-You can view /tmp/output.txt with the [cat command][3]:
-`$ cat /tmp/output.txt`
-Sample outputs:
-```
- Status of backup as on Thu Nov 16 17:00:21 IST 2017
- Backing up files /home/vivek and /etc/
-
-```
-
-### Disabling pathname/parameter/variable expansion, command substitution, arithmetic expansion
-
-Variable such as $HOME and command such as $(date) were interpreted substitution in script. To disable it use single quotes with 'EOF' as follows:
-```
-#!/bin/bash
-OUT=/tmp/output.txt
- 
-echo "Starting my script..."
-echo "Doing something..."
-# No parameter and variable expansion, command substitution, arithmetic expansion, or pathname expansion is performed on word.  
-# If any part of word is quoted, the delimiter  is  the  result  of  quote removal  on word, and the lines in the here-document 
-# are not expanded. So EOF is quoted as follows
-cat <<'EOF' >$OUT
-  Status of backup as on $(date)
-  Backing up files $HOME and /etc/
-EOF
- 
-echo "Starting backup using rsync..."
-```
-
-#!/bin/bash OUT=/tmp/output.txtecho "Starting my script..." echo "Doing something..." # No parameter and variable expansion, command substitution, arithmetic expansion, or pathname expansion is performed on word. # If any part of word is quoted, the delimiter is the result of quote removal on word, and the lines in the here-document # are not expanded. So EOF is quoted as follows cat <<'EOF' >$OUT Status of backup as on $(date) Backing up files $HOME and /etc/ EOFecho "Starting backup using rsync..."
-
-You can view /tmp/output.txt with the [cat command][3]:
-`$ cat /tmp/output.txt`
-Sample outputs:
-```
- Status of backup as on $(date)
- Backing up files $HOME and /etc/
-
-```
-
-## A note about using tee command
-
-The syntax is:
-```
-tee /tmp/filename <<EOF >/dev/null
-line 1
-line 2
-line 3
-$(cmd)
-$var on $foo
-EOF
-```
-
-tee /tmp/filename <<EOF >/dev/null line 1 line 2 line 3 $(cmd) $var on $foo EOF
-
-Or disable variable substitution/command substitution by quoting EOF in a single quote:
-```
-tee /tmp/filename <<'EOF' >/dev/null
-line 1
-line 2
-line 3
-$(cmd)
-$var on $foo
-EOF
-```
-
-tee /tmp/filename <<'EOF' >/dev/null line 1 line 2 line 3 $(cmd) $var on $foo EOF
-
-Here is my updated script:
-```
-#!/bin/bash
-OUT=/tmp/output.txt
- 
-echo "Starting my script..."
-echo "Doing something..."
- 
-tee $OUT <<EOF >/dev/null
-  Status of backup as on $(date)
-  Backing up files $HOME and /etc/
-EOF
- 
-echo "Starting backup using rsync..."
-```
-
-#!/bin/bash OUT=/tmp/output.txtecho "Starting my script..." echo "Doing something..."tee $OUT <<EOF >/dev/null Status of backup as on $(date) Backing up files $HOME and /etc/ EOFecho "Starting backup using rsync..."
-
-## A note about using in-memory here-docs
-
-Here is my updated script:
-```
-#!/bin/bash
-OUT=/tmp/output.txt
- 
-## in memory here docs 
-## thanks https://twitter.com/freebsdfrau
-exec 9<<EOF
-  Status of backup as on $(date)
-  Backing up files $HOME and /etc/
-EOF
- 
-## continue
-echo "Starting my script..."
-echo "Doing something..."
- 
-## do it
-cat <&9 >$OUT
- 
-echo "Starting backup using rsync..."
-```
-
-
-
---------------------------------------------------------------------------------
-
-via: https://www.cyberciti.biz/faq/using-heredoc-rediection-in-bash-shell-script-to-write-to-file/
-
-作者：[Vivek Gite][a]
-译者：[译者ID](https://github.com/译者ID)
-校对：[校对者ID](https://github.com/校对者ID)
-
-本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
-
-[a]:https://www.cyberciti.biz
-[1]:https://www.cyberciti.biz/media/new/faq/2017/11/redirect-output-of-here-document-to-a-text-file.jpg
-[2]:https://bash.cyberciti.biz/guide/Here_documents
-[3]:https//www.cyberciti.biz/faq/linux-unix-appleosx-bsd-cat-command-examples/ (See Linux/Unix cat command examples for more info)
diff --git a/translated/tech/20171116 How to use a here documents to write data to a file in bash script.md b/translated/tech/20171116 How to use a here documents to write data to a file in bash script.md
new file mode 100644
index 0000000000..f5dadc540d
--- /dev/null
+++ b/translated/tech/20171116 How to use a here documents to write data to a file in bash script.md	
@@ -0,0 +1,207 @@
+Bash脚本中如何使用 here 文档将数据写入文件
+======
+
+<ruby>here 文档<rt>here document</rt></ruby> （LCTT译注：here文档又称作 heredoc ）不是什么特殊的东西，只是一种 I/O 重定向方式，它告诉bash shell从当前源读取输入，直到读取到只有分隔符的行。
+![redirect output of here document to a text file][1]
+这对于向 ftp，cat，echo，ssh 和许多其他有用的 Linux/Unix 命令提供指令很有用。 此功能适用于 bash也适用于 Bourne，Korn，POSIX 这三种 shell。
+
+## here 文档语法
+
+语法是：
+```
+command <<EOF
+cmd1
+cmd2 arg1
+EOF
+```
+
+或者允许shell脚本中的 here 文档使用 **EOF<<-** 以自然的方式缩进
+
+```
+command <<-EOF
+ msg1
+ msg2
+ $var on line
+EOF
+```
+
+或者
+```
+command <<'EOF'
+ cmd1
+ cmd2 arg1
+ $var won't expand as parameter substitution turned off
+ by single quoting
+EOF
+```
+
+或者 **重定向并将其覆盖** 到名为my_output_file.txt的文件中：
+```
+command << EOF > my_output_file.txt
+ mesg1
+ msg2
+ msg3
+ $var on $foo
+EOF
+```
+
+或**重定向并将其追加**到名为my_output_file.txt的文件中：
+
+```
+command << EOF >> my_output_file.txt
+ mesg1
+ msg2
+ msg3
+ $var on $foo
+EOF
+```
+
+## 示例
+
+以下脚本将所需内容写入名为/tmp/output.txt的文件中：
+
+```
+#!/bin/bash
+OUT=/tmp/output.txt
+
+echo "Starting my script..."
+echo "Doing something..."
+
+cat <<EOF >$OUT
+  Status of backup as on $(date)
+  Backing up files $HOME and /etc/
+EOF
+
+echo "Starting backup using rsync..."
+```
+
+你可以使用[cat命令][3]查看/tmp/output.txt文件：
+
+```
+$ cat /tmp/output.txt
+```
+
+示例输出：
+
+```
+ Status of backup as on Thu Nov 16 17:00:21 IST 2017
+ Backing up files /home/vivek and /etc/
+
+```
+
+### 禁用路径名/参数/变量扩展，命令替换，算术扩展
+
+像 $HOME 这类变量和像 $(date) 这类命令在脚本中会被解释为替换。 要禁用它，请使用带有 'EOF' 这样带有单引号的形式，如下所示：
+
+```
+#!/bin/bash
+OUT=/tmp/output.txt
+
+echo "Starting my script..."
+echo "Doing something..."
+# No parameter and variable expansion, command substitution, arithmetic expansion, or pathname expansion is performed on word.  
+# If any part of word is quoted, the delimiter  is  the  result  of  quote removal  on word, and the lines in the here-document 
+# are not expanded. So EOF is quoted as follows
+cat <<'EOF' >$OUT
+  Status of backup as on $(date)
+  Backing up files $HOME and /etc/
+EOF
+
+echo "Starting backup using rsync..."
+```
+
+你可以使用[cat命令][3]查看/tmp/output.txt文件：
+
+```
+$ cat /tmp/output.txt
+```
+
+示例输出：
+
+```
+ Status of backup as on $(date)
+ Backing up files $HOME and /etc/
+
+```
+
+## 关于 tee 命令的使用
+
+语法是：
+```
+tee /tmp/filename <<EOF >/dev/null
+line 1
+line 2
+line 3
+$(cmd)
+$var on $foo
+EOF
+```
+
+或者通过在单引号中引用EOF来禁用变量替换和命令替换：
+
+```
+tee /tmp/filename <<'EOF' >/dev/null
+line 1
+line 2
+line 3
+$(cmd)
+$var on $foo
+EOF
+```
+
+这是我更新的脚本：
+```
+#!/bin/bash
+OUT=/tmp/output.txt
+
+echo "Starting my script..."
+echo "Doing something..."
+
+tee $OUT <<EOF >/dev/null
+  Status of backup as on $(date)
+  Backing up files $HOME and /etc/
+EOF
+
+echo "Starting backup using rsync..."
+```
+
+## 关于内存 here 文档的使用
+
+这是我更新的脚本：
+```
+#!/bin/bash
+OUT=/tmp/output.txt
+
+## in memory here docs 
+## thanks https://twitter.com/freebsdfrau
+exec 9<<EOF
+  Status of backup as on $(date)
+  Backing up files $HOME and /etc/
+EOF
+
+## continue
+echo "Starting my script..."
+echo "Doing something..."
+
+## do it
+cat <&9 >$OUT
+
+echo "Starting backup using rsync..."
+```
+
+
+
+--------------------------------------------------------------------------------
+
+via: https://www.cyberciti.biz/faq/using-heredoc-rediection-in-bash-shell-script-to-write-to-file/
+
+作者：[Vivek Gite][a]
+译者：[Flowsnow](https://github.com/Flowsnow)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.cyberciti.biz
+[1]: https://www.cyberciti.biz/media/new/faq/2017/11/redirect-output-of-here-document-to-a-text-file.jpg
+[2]: https://bash.cyberciti.biz/guide/Here_documents
+[3]: https//www.cyberciti.biz/faq/linux-unix-appleosx-bsd-cat-command-examples/	"See Linux/Unix cat command examples for more info"
\ No newline at end of file