How to use the command line to clear files under macos

Command to completely clear the file:

(Related recommendations: macos)

//注意冒号:是占位符
$ :>filename
$ cat /dev/null > filename
$ cp /dev/null filename

If you don’t mind empty lines inside or space, you can also use the following command:

$ echo “” > filename
$ echo /dev/null > filename
$ echo > filename

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