Unix Linux Empty or Delete a Large File Content on Linux Tips of Linux Empty File Content by Redirecting to Null 1 # > access.log Empty File Using ‘true’ Command Redirection 1 2 3 # : > access.log # true > access.log Empty File Using cat/cp/dd utilities with /dev/null 1 2 3 4 5 # cat /dev/null > access.log # cp /dev/null access.log # dd if=/dev/null of=access.log Empty File Using echo Command 1 2 3 4 5 # echo "" > access.log # echo -n "" > access.log # echo > access.log Empty File Using truncate Command 1 # truncate -s 0 access.log