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20.2 logname: Print current login name

logname prints the calling user's name, as found in a system-maintained file (often ‘/var/run/utmp’ or ‘/etc/utmp’), and exits with a status of 0. If there is no entry for the calling process, logname prints an error message and exits with a status of 1.

The only options are ‘--help’ and ‘--version’. See section Common options.

An exit status of zero indicates success, and a nonzero value indicates failure.


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