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December 12, 2015 02:38
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simple cronjob to alert on 'unknown/unexpected' access to a system.
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| 0 */1 * * * last -5 | grep -v '[user]\|wtmp\|reboot\|shutdown' && last -10 | grep -v '[user]\|wtmp\|reboot\|shutdown' >> ~/Desktop/ALERT && wall -g [group] ~/Desktop/ALERT |
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