9-shell echo Command

Shell echo Command
The echo command of the Shell is similar to the echo command of PHP, and is used for the output of strings. Command format:
echo string
You can use echo to achieve more complex output format control.
1. Display normal string:
echo "It is a test"
The double quotes here are completely omitted, and the following commands are identical to the previous instance:
Echo It is a test
2. Show escape characters
echo "\" It is a test\ ""
The result will be:
"It is a test"
Similarly, double quotes can also be omitted
3. Display Variables
The read command reads a row from the standard input and assigns the value of each field in the input row to the shell variable
　　 #!/bin/sh
Read name
echo "$name It is a test"
The above code is saved as test.sh,name to receive the standard input variables, the result will be:
[Email protected] ~]# sh test.sh
OK #标准输入
OK It is a test #输出
4. Show line breaks
　　 #!/bin/sh
echo "ok!\ n"# \ n line-break
echo "It it a test"
Output Result:
Ok!

It it a test
5. Show No Line break
　　 #!/bin/sh
echo "ok!\c# \c does not break the line
echo "It is a test"
Output Result:
Ok! It is a test
6. Show Results directed to file
echo "It is a test">MyFile
7. Output strings As-is, without escaping or taking variables (in single quotes)
echo ' $name \ '
Output Result:
$name \ "
8. Show command execution results
Echo' Date '
Note: The use of anti-quotes ' instead of single quotes is used here.
The result will show the current date
Thu Jul 10:08:46 CST 2014

9-shell echo Command