CentOS cat /dev/null > /var/log/wtmpcat /dev/null > /var/log/btmpcat /dev/null > /var/log/lastlogcat /dev/null > /var/log/securehistory -cw Ubuntu cat /dev/null > /var/log/wtmpcat /dev/null > /var/log/btmpcat /dev/null > /var/log/lastlogcat /dev/null > /var/log/auth.loghistory -cw
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