What is "logname"

In computer software, logname (stands for Login Name) is a program in Unix and Unix-like operating systems that prints the name of the user executing the command. It corresponds to the LOGNAME variable in the system-state environment. The logname system call and command appeared for the first time in UNIX System III.

$ logname --help Usage: logname [OPTION] Print the name of the current user. --help display this help and exit --version output version information and exit