Easy Script, just to find the given username if is it online or not

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# 1  
Old 10-13-2009
Easy Script, just to find the given username if is it online or not

hey guys plz help me..with shell script.

i must find the given(the user types a username) username if is it login or not..

i know how to do it logically, but i think that i can't in scripting.

Thank you all
# 2  
Old 10-13-2009
A simple thing could be, in bash.
$ cat chk-loggedin.sh
echo -n "Enter the username: "
read a
w | grep $a >> /dev/null
if [ $? -eq 0 ]; then
    echo "User $a is logged in..";
    echo "User $a is not logged in.";

# 3  
Old 10-14-2009
i think that one will help me alot...i will post you tomorrow if everything was ok...because i dont have unix system right now.

thank you a lot!

---------- Post updated 10-14-09 at 09:59 AM ---------- Previous update was 10-13-09 at 06:42 PM ----------

everything is ok, but i get an error in line 1 about the $ it says that $: not found, any ideas?
# 4  
Old 10-14-2009
this is not part of the script... "cat file" just shows what is inside the file.
# 5  
Old 10-14-2009
ok so i need to delete the line 1?
i did it and everything is ok..is that correct?

Thank you all
# 6  
Old 10-14-2009
Ya, you are right.

Exclude the first line, and have all the remaining lines in the script. Execute the script, which would ask you a user name and finds out whether that persons is logged in or not.
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