Non root user access to /dev/mem Post: 303021417

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Top Forums UNIX for Advanced & Expert Users Non root user access to /dev/mem Post 303021417 by Neo on Thursday 9th of August 2018 06:47:54 AM

08-09-2018

Administrator

HINT3:

Here is a file from a Linux server:

Code:

root@www:/etc/rc.d/init.d# ls
monitorix
root@www:/etc/rc.d/init.d# cat monito*
#!/bin/bash
#
#	/etc/rc.d/init.d/monitorix
#
# Starts the Monitorix daemon
#
# chkconfig: 2345 99 10
# description: Monitorix is a lightweight system monitoring tool
# processname: monitorix
# config: /etc/monitorix.conf
# pidfile: /var/run/monitorix.pid

### BEGIN INIT INFO
# Provides:          monitorix
# Required-Start:    $local_fs
# Required-Stop:     $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start up the Monitorix daemon
# Description:       Monitorix is a free, open source, lightweight system
#                    monitoring tool designed to monitor as many services and
#                    system resources as possible.
### END INIT INFO

# Source function library
. /etc/init.d/functions

if [ -f /etc/sysconfig/monitorix -a $UID -eq 0 ]; then
	. /etc/sysconfig/monitorix
fi

RETVAL=0
PROG="monitorix"
DAEMON="/usr/bin/monitorix"
PIDFILE="/var/run/monitorix.pid"
CONF="/etc/monitorix.conf"

start() {
	if [ ! -f /var/lock/subsys/$PROG ] ; then
		echo -n $"Starting $PROG: "
		daemon $DAEMON -c $CONF -p $PIDFILE $OPTIONS && success || failure
		RETVAL=$?
		if [ $RETVAL -eq 0 ] ; then
			touch /var/lock/subsys/$PROG
			echo
		fi
	fi
}

stop() {
	echo -n $"Stopping $PROG: "
	killproc $PROG
	RETVAL=$?
	rm -f /var/lock/subsys/$PROG
	rm -f $PIDFILE
	echo
}

restart() {
	stop
	start
}

case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	restart)
		restart
		;;
	condrestart)
		if [ -f /var/lock/subsys/$PROG ] ; then
			restart
		fi
		;;
	status)
        	status $PROG
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|condrestart|status}"
		exit 1
esac

exit $RETVAL

Reading the files on your Linux server will provide you with a vast amount of knowledge.

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LEARN ABOUT REDHAT

netdump

NETDUMP-CLIENT(8)						  System Programs						 NETDUMP-CLIENT(8)

NAME

       netdump - send oops data and memory dumps over the network

SYNOPSIS

       /etc/init.d/netdump (start|stop|status|restart|propagate)

DESCRIPTION

       Loads and configures the netdump kernel modules. Once these are loaded, when the kernel crashes it will send the oops message and a dump of
       physical memory to the machine that runs the netdump-server. This can then be used to debug the problem using gdb and a kernel image.

OPTIONS

       start  Starts the netdump client service. Loads the kernel modules with the right options.

       stop   Unloads the kernel modules.

       status Shows the status of the netdump client

       restart
	      Restarts the netclient modules with new configurations.

       propagate
	      Sends the ssh public key needed to update the random key for each netdump session to the netdump server.

FILES

       /etc/sysconfig/netdump
	      Configuration for the netdump client. You need to at least specify the address of the machine running the netdump server here.

       /etc/sysconfig/netdump_id_dsa.pub
	      Public key for this machine. Used by the server to authenticate the client.  This must be installed on the server, possibly by using
	      the the propagate capability of the netdump init script, which does:
	      cat /etc/sysconfig/netdump_id_dsa.pu | ssh netdump@$NETDUMPADDR cat '>>' /var/crash/.ssh/authorized_keys2
	      Where $NETDUMPADDR is the ip or name of the machine running the netdump server.

SEE ALSO

       netdump-server(8), init(8)

BUGS

       Report any bugs you find to http://bugzilla.redhat.com/bugzilla

AUTHOR

       Alexander Larsson <alexl@redhat.com>

Linux								    14 Feb 2002 						 NETDUMP-CLIENT(8)

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