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       cereal-admin - administer cereal sessions


       cereal-admin command [args]


       cereal-admin  is  a  program  to  administer cereal sessions.  A cereal
       session is a special  (restricted)  screen(1)  session  attached  to  a
       serial  terminal.   Each  cereal  session is owned by a particular user
       (USER) who is allowed to "attach" to  the  cereal  screen  session  and
       interact  with  the  specified serial terminal via screen.  Each cereal
       session is also associated with a particular log group (LOGGROUP) whose
       members are allowed to "follow" the logs of the session.

       Cereal  was  designed  to  monitor serial lines connected to the serial
       consoles of remote machines.  The cereal system is outlined at:


       cereal-admin takes various subcommands:

              Create a new session named SESSION on tty TTY,  with  baud  rate
              BAUD.   USER is the user that will own the session, and LOGGROUP
              is the group that will  be  able  to  follow  the  session  non-
              interactively  (ie.  read  the logs).  Once created, the session
              will be in a "stopped" state.  ‘c’  may  be  used  in  place  of

       start [options] SESSION [SESSION]...
              Start  session(s).   For  each  session  specified,  the session
              directory is registered in the runsvdir directory.   The  screen
              session  will  be attached to the serial terminal and logging of
              the terminal will begin.  ‘s’ may be used in place  of  ‘start’.
              options: -a (--all) to enable all sessions.

       restart [options] SESSION [SESSION]...
              Restart  session(s).   This  sends  running sessions a "restart"
              signal, and starts session that are not running.   This  can  be
              used  when changes have been made to the screenrc, for instance.
              ‘r’ may be used in place of ‘restart’.  options: -a  (--all)  to
              disable  all  sessions,  -r  (--running)  to  restart  just  the
              currently running sessions.

       stop [options] SESSION [SESSION]...
              Stop session(s).  This kills the screen session attached to  the
              serial  terminal  by  sending  it  an  "exit"  signal,  and then
              unregistering the session directory from the runsvdir directory.
              ‘k’  may  be  used  in  place of ‘stop’.  options: -a (--all) to
              disable all sessions.

       destroy [options] SESSION [SESSION]...
              Destroy session(s) entirely.   This  will  destroy  the  session
              directory,  including  all  history of the session and the logs.
              ‘d’ may be used in place of ‘destroy’.  options: -a  (--all)  to
              remove all sessions.

       list [SESSION]...
              List  session(s).   With  no  arguments, will list all sessions.
              The leading three characters in the list indicate:  whether  the
              session  is running (+) or not (-) or in some unknown state (?),
              whether the user can attach to  the  session  (a)  or  not  (-),
              whether  the user can follow the session (f) or not (-).  If the
              session state is unknown (?),  it’s  usually  because  the  user
              asking  for information about the session can’t read the session
              stat file.  ‘l’ may be used in place of ‘list’.

       help   Output a brief usage summary.  ‘h’ or ‘?’ may be used  in  place
              of ‘help’.


       Logs  are handled by svlogd.  For information on how to control session
       log handling, please  see  svlogd(8)  and/or  log-limits.txt  from  the
       documentation of this package.


              Default cereal screenrc file.

              Configuration  file  to  set parameters for session creation and

              Special screenrc file for session SESSION.  The presence of this
              file overrides the default screenrc file /etc/cereal/screenrc.


       Exit status is 0 if OK, 1 if minor problems, 2 if serious trouble.


       Written by Jameson Rollins and Daniel Kahn Gillmor.


       If  the  invoking  user  does  not  have read and execute access to the
       cereal session’s  supervise  directory,  ‘cereal-admin  list’  may  not
       always indicate that session’s status accurately.


       Report bugs to <>.


       Copyright © 2007 Jameson Rollins and Daniel Kahn Gillmor
       This  is  free  software.   You may redistribute copies of it under the
       terms      of      the      GNU      General       Public       License
       <>.   There  is NO WARRANTY, to the
       extent permitted by law.


       cereal(1), screen(1), runsvdir(8), svlogd(8)