How to empty the contents of a file in Linux

Method 1:

echo "" >/www.jbxue.com/xxx.log

Method 2:

echo "" >>/www.jbxue.com/xxx.log

Method 3:

This command can achieve the same effect as echo >/var/log/big.log, but after the command executes, it needs to end with Ctrl + D

Method 4:

Clear >/opt/log/big.log This command empties the contents of the Big.log file without deleting the file

Method 5:

The same effect, with true, Flase, ":" can also be used to clear the contents of the file, without deleting the effect of the file

True >/opt/log/big.log flase >/opt/log/big.log: >/opt/log/big.log Method 6:

Cat/dev/null >/opt/log/big.log flase