Quickly empty the contents of a Linux text file

1.[[email protected] huage]#: > FileName
: is a placeholder that does not produce any input

2.[[email protected] huage]# > FileName
Also produces no output

3.[[email protected] huage]# echo "" > FileName
You'll see a blank line with a file size of 1byte

4.[[email protected] huage]# echo > FileName
You'll see a blank line with a file size of 1byte

5.[[email protected] log]# cat/dev/null > FileName
The file does not produce any output

Quickly empty the contents of a Linux text file