Basic tinkering with “set” command and “noclobber” related

commandline session

[bash light=”true”]
$echo improve > clean.txt
$cat clean.txt
improve
$set -o noclobber
$echo new > clean.txt
bash: clean.txt: cannot overwrite existing file
$echo new >> clean.txt
$cat clean.txt
improve
new
$echo again >| clean.txt
$cat clean.txt
again
$set +o noclobber
$echo improve > clean.txt
$cat clean.txt
improve
$
[/bash]