nixCraft

eawedat · #1 (**permalink**) 27-05-2009, 12:17 AM

hey all,,

am wondering if it is possible to do such a thing:

a script.. which does its work like wallop message.

to do cat/etc/passwd | wc -l
to count how much users they are totally.
then to check each user 1 per 1 if s/he is online.(connected to the shell) if yes,, then write a user message with write command.
and loop till we get to the count(num) of all users.

thanks

nixcraft · #2 (**permalink**) 27-05-2009, 06:34 PM

wall command does the same thing..

eawedat · #3 (**permalink**) 27-05-2009, 07:33 PM

hey
i know nixcraft
i need a script that does that.

nixcraft · #4 (**permalink**) 28-05-2009, 12:12 AM

I really don't see any point reinventing the wheels, but here is what you can try:

Code:

#!/bin/sh
message="This is a test message"
USERS=$(who | awk '{ print $1}' |  uniq)
for u in $USERS; do echo "$message" | write $u; done

eawedat · #5 (**permalink**) 28-05-2009, 02:57 AM

thanks nixcraft
there is term that scientists have been using it called "open-minded thinking",,
its always better to know how things work in background besides foreground

for a normal user (a Microsoft's user for example.) what makes sense to him is to look at nice GUI and and use programs easily without knowing what is going around and how things go between hardware and software,,

and that's what makes me interested ,, Operating Systems give you the answer nixcraft

"its a course that lecturers give it in Software engineering faculty"
to think behind and not to get enough with a simple/easy way.

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