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On this page you find all important commands for the CLI tool lastb. If the
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lastb
The command line tool "lastb" is a utility in Unix-like operating systems that displays the most recent failed login attempts recorded in the system's lastlog file. It provides administrators with a convenient way to monitor and analyze unsuccessful login attempts.
- The "lastb" command stands for "last bad" or "last blocked," indicating that it specifically focuses on failed login attempts.
- It displays the username, terminal, source IP address, and the time and date of each failed attempt.
- The lastb command reads the data from the binary lastlog file, which keeps track of previous login activity.
- It allows system administrators to identify potential security threats and take appropriate actions to prevent unauthorized access.
- The output of the lastb command can be sorted, filtered, or further processed using various command line options and tools.
- The utility requires superuser or root privileges to execute, as it reads sensitive login information.
- By reviewing the information provided by lastb, administrators can investigate suspicious login attempts, detect patterns or anomalies, and strengthen overall system security.
List of commands for lastb:
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lastb:tldr:3ad35 lastb: Show a list of all logged in users at a specific time.$ sudo lastb --present ${hh:mm}try on your machineexplain this command
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lastb:tldr:5fd20 lastb: Show a list of all last logged in users and translate the IP into a hostname.$ sudo lastb --dnstry on your machineexplain this command
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lastb:tldr:96524 lastb: Show a list of all last logged in users until a given time.$ sudo lastb --until ${YYYY-MM-DD}try on your machineexplain this command
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lastb:tldr:e4093 lastb: Show a list of all last logged in users.$ sudo lastbtry on your machineexplain this command
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lastb:tldr:edd17 lastb: Show a list of all last logged in users since a given time.$ sudo lastb --since ${YYYY-MM-DD}try on your machineexplain this command