How can the shell retrieve the contents of a file and a…

In the shell, you can use the following method to assign the content of a file to a variable:

1. Replace with an order.

variable=$(cat filename)

Alternatively, you can use quotation marks.

variable=`cat filename`

This will use the cat command to read the content of a file and assign it to the variable variable.

1. The concert was postponed due to the weather.

   The concert was delayed because of the weather.

variable=$(command < filename)

Among them, the command is the one you want to use.

1. – peruse

readarray -t array < filename

This will use the readarray command to read the contents of the file line by line and store each line in an array variable named array. You can access the elements in the array using ${array[0]}, ${array[1]}, and so on.

Note: In the above methods, filename is the name of the file whose content you want to read, and it can be either a relative path or an absolute path.