return the user's login name
Display the currently logged in user's name
Print the user's login name.
display this help and exit
output version information and exit
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Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
getlogin(3) Full documentation <https://www.gnu.org/software/coreutils/logname> or available locally via: info '(coreutils) logname invocation'
Written by FIXME: unknown.