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I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example?

UPDATE: from ' info who' :

If given no non-option arguments, who prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who uses that instead of a default system-maintained file (often /var/run/utmp or /etc/utmp) as the name of the file containing the record of users logged on. /var/log/wtmp is commonly given as an argument to who to look at who has previously logged on.

If given two non-option arguments, who prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are am i, as in who am i.

I [thought to] know the difference between an argument and an option, but this [again] nixes a lot.

I am trying to understand info who but completly fail at the term "non-option argument". Can someone please explain this term to me in simple words or an example?

UPDATE: from info who :

If given no non-option arguments, who prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who uses that instead of a default system-maintained file (often /var/run/utmp or /etc/utmp) as the name of the file containing the record of users logged on. /var/log/wtmp is commonly given as an argument to who to look at who has previously logged on.

If given two non-option arguments, who prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are am i, as in who am i.

I [thought to] know the difference between an argument and an option, but this [again] nixes a lot.

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example?

UPDATE: from ' info who' :

If given no non-option arguments, `who' prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who' uses that instead of a default system-maintained file (often /var/run/utmp' or /etc/utmp') as the name of the file containing the record of users logged on. /var/log/wtmp' is commonly given as an argument to `who' to look at who has previously logged on.

If given two non-option arguments, who' prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are am i', as in `who am i'.

I [thought to] know the difference between an argument and an option, but this [again] nixes a lot.

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example?

UPDATE: from ' info who' :

If given no non-option arguments, who prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who uses that instead of a default system-maintained file (often /var/run/utmp or /etc/utmp) as the name of the file containing the record of users logged on. /var/log/wtmp is commonly given as an argument to who to look at who has previously logged on.

If given two non-option arguments, who prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are am i, as in who am i.

I [thought to] know the difference between an argument and an option, but this [again] nixes a lot.

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example?

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example?

UPDATE: from ' info who' :

If given no non-option arguments, `who' prints the following information for each user currently logged on: login name, terminal line, login time, and remote hostname or X display.

If given one non-option argument, who' uses that instead of a default system-maintained file (often /var/run/utmp' or /etc/utmp') as the name of the file containing the record of users logged on. /var/log/wtmp' is commonly given as an argument to `who' to look at who has previously logged on.

If given two non-option arguments, who' prints only the entry for the user running it (determined from its standard input), preceded by the hostname. Traditionally, the two arguments given are am i', as in `who am i'.

I [thought to] know the difference between an argument and an option, but this [again] nixes a lot.