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Multiuser Mode & ACL commands - Examples (2006-03-09)
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put screen into multiuser mode:
  :multiuser on

allow another user "sister" to attach to the session:
  :acladd sister

note: this adds user "sister" with
*all* permissions to *all* windows!


ODO:
chacl * -w
chacl = change access control list
   *  = all users
  -w  = permission (read, write, execute) screen commands
   ?  = all windows

do not forget to grant access to yourself,
because * includes yourself.
One way to fix it is denying access
to everybody and allow to yourself:

    C-a :chacl * -w 0
    C-a :chacl myusername +w 0