Shell echo Command

Source: Internet
Author: User
Tags 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:

String

You can use echo to achieve more complex output format control.

1. Display Normal string:
" It is a test "

The double quotes here are completely omitted, and the following commands are identical to the previous instance:

 is a test

2. Show escape characters
" \ "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/"$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.shok                       is a test        #输出

4. Show line breaks
" ok! \ n " #-"it it a test"

Output Result:

Ok! it it a test

5. Show No Line break
#!/bin/"ok! \c" #-"It is a test"

Output Result:

 is a test

6. Show results directed to file
" It is a test " > MyFile

7. Output strings As-is, without escaping or taking variables (in single quotes)
' $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

 - ::

Shell echo Command

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