Zero byte a File

/dev/null (zero out) a bunch of files at once

cd /var/log
cat /dev/null | tee {boot.log,cron,dmesg,lastlog,messages,secure,vzctl.log,vznetcfg.log,wtmp}
>boot.log>cron>dmesg>messages>secure>vzctl.log>vznetcfg.log>wtmp
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