Cyber Attacks Test Pentagon, Allies and Foes

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09-29-2010

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Cyber Attacks Test Pentagon, Allies and Foes

Siobhan Gorman and Stephen Fidler, Wall Street Journal. Adversarial nations worldwide have adopted cyberespionage and cyberattacks as staples of modern warfare, and U.S. defense officials estimate that more than 100 countries are currently attempting to penetrate U.S. networks, with the greatest concentration of attacks based in China and Russia. U.S. military and civilian networks are [...]

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LEARN ABOUT REDHAT

wall

WALL(1) 							Linux User's Manual							   WALL(1)

NAME

       wall -- send a message to everybody's terminal.

SYNOPSIS

       wall [ message ]

DESCRIPTION

       Wall  sends  a message to everybody logged in with their mesg(1) permission set to yes. The message can be given as an argument to wall, or
       it can be sent to wall's standard input. When using the standard input from a terminal, the message should be terminated with the  EOF  key
       (usually Control-D).

       The length of the message is limited to 20 lines.

NOTES

       There  is  an undocumented (well not anymore..) option, "-n", that supresses the banner printed by wall .  This is for usage by rwalld (8).
       Wall will not allow you to use that flag if wall is installed set-group-id and the user executing wall is not root.

       For every invocation of wall a notification will be written to syslog, with facility LOG_USER and level LOG_INFO.

ENVIRONMENT

       Wall ignores the TZ variable - the time printed in the banner is based on the systems local time.

SEE ALSO

       mesg(1), rpc.rwalld(8).

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

								 12 September 2000							   WALL(1)

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