Linux Command learning-single quotation marks (''), double quotation marks (" "), and small quotation marks ('')

Linux Command learning-single quotation marks (''), double quotation marks (" "), and small quotation marks ('') are also very important for the application of quotation marks when writing shell scripts, here we will summarize the characteristics of the three quotation marks. 1. Single quotes (''). The content enclosed by single quotes will be treated as a string. Even if a line break like \ n is made, \ n rather than a line break will be output. 2. Double quotation marks (""). Unlike single quotation marks, double quotation marks output escape characters of the Package content. The following is an example: [javascript] $ name = kehr $ echo "$ name" kehr $ echo '$ name' $ name obviously shows the difference between the two. 3. Small quotation marks ('') I don't know the name of this symbol. I call it "Small quotation marks", haha. The function is to execute the content enclosed in small quotes first. For example, the following command is used when we install files such as kernel devel: [html] yum install kernel-devel-'uname-R' the small quotation mark here is the key on the left of the keyboard number 1.