02-09-2013
Finding first difference between two files
Hi!
I'd like to know if it is possible for a command to find the first difference between two large files, output that line from both file and stop, so no need to continue after that to save some computation time.
I don't think looping through it will be efficient enough but that's the only thing i can think of...
Better: Aside from outputting the different line, it would be better if it could output the preceding line too.
Thanks!!!!!
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rwho(1) General Commands Manual rwho(1)
NAME
rwho - show who is logged in on local machines
SYNOPSIS
DESCRIPTION
produces output similar to the output of the HP-UX command for all machines on the local network that are running the daemon (see who(1)
and rwhod(1M)). If has not received a report from a machine for 11 minutes, assumes the machine is down and does not report users last
known to be logged into that machine.
output line has fields for the name of the user, the name of the machine, the user's terminal line, the time the user logged in, and the
amount of time the user has been idle. Idle time is shown as:
If a user has not typed to the system for a minute or more, reports this as idle time. If a user has not typed to the system for an hour
or more, the user is omitted from output unless the flag is given.
An example output line from would look similar to:
This output line could be interpreted as is logged into and his terminal line is has been logged on since September 12 at 13:28 (1:28
p.m.). has not typed anything into for 11 minutes.
WARNINGS
output becomes unwieldy when the number of users for each machine on the local network running becomes large. One line of output occurs
for each user on each machine on the local network that is running
AUTHOR
was developed by the University of California, Berkeley.
FILES
Information about other machines.
SEE ALSO
ruptime(1), rusers(1), rwhod(1M).
rwho(1)