Shell echo Command

Echo is an internal command of the shell that prints the specified string on the screen. Command format:

1. Echo Arg

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

Show escape characters

1. echo "\"It is a test\ ""

The result will be:
"It is a test"

Double quotes can also be omitted.

Show variables

1. Name="OK"
2. echo "$name It is a test"

The result will be:
OK It is a test

The same double quotation marks can also be omitted.

If the variable is connected to another character, you need to use curly braces ({}):

1. Mouth=8
2. echo "${mouth}-1-2009"

The result will be:
8-1-2009

Show line breaks

1. echo "ok! \ n"
2. Echo "It is a test"

Output:
Ok!
It is a test

Show No Line breaks

1. echo "ok! \c"
2. Echo "It is a test"

Output:
Ok! It si a test

Show results redirected to file

1. Echo "It is a test" > MyFile

Output string AS-is

If you want to output the string as-is (without escaping), use single quotation marks. For example:

1. echo ' $name\ '

Show command Execution results

1. Echo ' Date '

The result will show the current date

As can be seen from the above, double quotes are dispensable, single quotes are mainly used in the original output.

Shell echo Command