[In Linux]shell, the application of the anti-quote (')

The anti-quote bit (') is located above the TAB key of the keyboard, to the left of the 1 key. Note the difference between the single quotation mark (') on the left side of the ENTER key.

Anti-quote bit (') plays the role of command substitution in Linux . Command substitution refers to the ability of the shell to interpolate the standard output of a command anywhere on a command line.

As an example:

[Email protected]:~$ date2014 October 29 Wed 15:14:46 Cst[email protected]:~$ echo ' Date ' | Cut-d '  -f1-42014 Wednesday October 29

As you can see, the date command inside the anti-quote ' is executed first, and then the output of the date command is replaced with the corresponding location.

Very effective metacharacters, which are commonly used in the shell.

[In Linux]shell, the application of the anti-quote (')