Last update at ：2024-01-27，Edit by888u
VPS users who often use the Linux system will definitely check the user login log, especially some developers. There are two types of logs to record user login behavior, namely recording the user's data and recording the user's login behavior. Login time, this article introduces several commonly used user login log query methods in Linux.
1. lastlog lists the last login information of all users
lastlog refers to the content in /var/log/lastlog and will display the login name, port number (tty) and last login time. Note that you need to run this command as root.
Bash Command parameters: -b2. Last lists the information of users who have logged in to the system
last can view the user information logged into the system. By default, the /var/log/wtmp file information is read. You can also read the specified file through the -f parameter.
Bash echo > /var/log/wtmp #Clear successful login informationThe last command is best used in conjunction with the filter command and is also highly recommended.
3. lastb lists failed login records
The lastb command is similar to the last command above. It lists the login information of users who failed to log in. By default, it reads the /var/log/btmp file information. The command example is as follows:
Bash lastb |less lastb |grep [filter parameters] #Clear login failed logs echo > /var/log/btmpBanwagonhost 2022 New Year’s Day Promotion
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