varlogwtmp
Varlogwtmp refers to the binary log file used by Unix-like systems to record login activity and related system events. Located at /var/log/wtmp, it provides a historical ledger of user sessions, including logins, logouts, and boot or shutdown events. The file is written by programs that establish or terminate sessions, such as login, sshd, and system startup processes.
Content and format: Wtmp is a binary file defined by the utmp/wtmp data structures in the system
Reading and interpretation: Utilities such as last read /var/log/wtmp to show a historical sequence of logins
Maintenance and privacy: Wtmp files grow over time and are typically rotated by system log management to