Shell: Search in logs

Last update: 03 May 23:20
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solution

The logs directory includes an access.log file, which stores the logs for server connection. You need to find the possible hacking attempts in this file.

02.01.2021 05:33:50 localhost ssh: denied wrong password from 156.78.198.42
02.01.2021 06:28:29 localhost ssh: successfully authenticated from 108.117.162.5
02.01.2021 07:27:32 localhost ssh: successfully logged out from 254.199.78.117
02.01.2021 11:24:56 localhost ssh: connection dropped by timeout from 227.65.89.157
02.01.2021 11:59:29 localhost ssh: denied wrong password from 252.175.99.156
02.01.2021 12:17:44 localhost ssh: connection dropped by timeout from 50.26.154.246

In the solution file write a command to find lines containing "denied wrong password" in the access.log file; sort them in a reverse order and print the five most recent entries.

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