Shell File Inclusion

Like other languages, Shell can also include external scripts. This makes it very convenient to encapsulate some common code as a separate file.

The syntax format of Shell file inclusion is as follows:

.　filename　　　#　Note that there is a space between the dot and the filename
or
source filename

Online Examples

Create two shell script files.

test1.sh code as follows:

#!/bin/bash
#　author:Basic Tutorial Network
#　url:www.oldtoolbag.com
url="http://www.oldtoolbag.com"

test2.sh code as follows:

#!/bin/bash
#　author:Basic Tutorial Network
#　url:www.oldtoolbag.com
#Use the　.　symbol to refer to test1.sh　file
.　./test1.sh
#　or use the following included file code
#　source　./test1.sh
echo "Official website address of Basic Tutorial Network: $url"

Next, we will set up the test2Add executable permission to .sh and execute:

$　chmod　+x　test2.sh　
$　./test2.sh　
Official website address of Basic Tutorial Network: http://www.oldtoolbag.com

Note:The included file test1.sh does not require executable permission.