Frequent question: What does last command do in Linux?

The last command displays information about the last logged-in users. It’s pretty convenient and handy when we need to track login activities or investigate a possible security breach. The last command will, by default, take the system log file /var/log/wtmp as the data source to generate reports.

How check last used command in Linux?

In Linux, there is a very useful command to show you all of the last commands that have been recently used. The command is simply called history, but can also be accessed by looking at your . bash_history in your home folder. By default, the history command will show you the last five hundred commands you have entered.

What does wtmp mean in Linux?

Wtmp is a file on the Linux, Solaris, and BSD operating systems that keeps a history of all logins and logouts. On Linux systems, it is located at /var/log/wtmp. Various commands access wtmp to report login statistics, including the who and lastb commands.

What is crash in last command?

1. order by. 17. last prints crash as logout time when there is no logout entry in the wtmp database for an user session. The last entry in last output means that myuser logged on pts/0 at 12:02 and, when system crashed between 14:18 and 15:03, it should be still logged in.

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What does du command do in Linux?

The du command is a standard Linux/Unix command that allows a user to gain disk usage information quickly. It is best applied to specific directories and allows many variations for customizing the output to meet your needs.

What is utmp in Linux?

The utmp file allows one to discover information about who is currently using the system. There may be more users currently using the system, because not all programs use utmp logging. Warning: utmp must not be writable by the user class “other”, because many system programs (foolishly) depend on its integrity.

What is btmp in Linux?

utmp, wtmp, btmp and variants such as utmpx, wtmpx and btmpx are files on Unix-like systems that keep track of all logins and logouts to the system.

What does finger command do in Linux?

Finger command is a user information lookup command which gives details of all the users logged in. This tool is generally used by system administrators. It provides details like login name, user name, idle time, login time, and in some cases their email address even.

What is the use of top command in Linux?

top command in Linux with Examples. top command is used to show the Linux processes. It provides a dynamic real-time view of the running system. Usually, this command shows the summary information of the system and the list of processes or threads which are currently managed by the Linux Kernel.

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