message to all users logged in

[Oliver Schmitz]

Dear all,

how to send a short message to all users which are logged in to a workstation before maintenance shutdown?

Thanks and best regards,

oliver

[Bharat Katkar · Accepted solution]

Oliver,

# wall
Type your message here
Press D to finish

#

Regards,

[Indira Aramandla]

Hi,

If you need to issue a general message to all the users logged on the server then issue the command wall

wall
â message textâ followed by CTRL/D

[Robert-Jan Goossens]

Hi Oliver,

Create a message with vi and save it,

# wall < message

Regards,
Robert-Jan

[Rainer von Bongartz]

use the wall command or shutdown with a grace period and 'send your own message' option

Regards
Rainer

[Sanjay Kumar Suri]

You can use following command
wall file_name

where file_name contains the short message.

sks

[Ravi_8]

Hi

#wall

ctrl+d

[H.Merijn Brand (procura]

All of the above gave the correct answer for the default state of users logged in

B U T . . .

All users (and applications) can disable the reception of the messages sent with 'wall' with

# mesg n

mesg without argument gives you the current state, also in it's return value

Hope this helps (a bit).
Enjoy, Have FUN! H.Merijn

[Isralyn Manalac_1]

You can use the wall command for this. See the man pages.

Regards,

Ira

[bergmans]

what about users logging in after your wall command?

[Bharat Katkar]

Shutdown will take care of them. :))

[Cheryl Griffin]

You might want to use wall and update the /etc/motd.

wall reaches those already logged in.
/etc/motd will reach those logging in after the fact.

[Theo Langenberg]

Oliver,

You can do it on a funny way,

# who
user1 ttyp1 Jul 29 08:36
user2 ttyp2 Aug 10 07:55
user3 ttyp5 Aug 10 12:11

cat message_file > /dev/ttyp1
..
cat message_file > /dev/ttyp1

OR

for i in `who | awk '{print $2}'
do
cat message_file > /dev/${i}
done

rgrds Theo