Enclosed please find code and man page of a bash+sed script that uses update-rc.d to emulate the behavior of the IRIX/Red-Hat chkconfig tool Try a few invocations with --dryrun to see exactly what it does -- that switch makes it print the generated commands rather than executing them. | Author: Eric S. Raymond | Source: https://lists.ubuntu.com/…

chkconfig

#!/bin/bash
#
# chkconfig -- list, enable, and disable system services by runlevel
#
# By Eric S. Raymond, May 2007.  Released under BSD license.
#
# This is an emulation of the IRIX chkconfig tool to run over Debian/Ubuntu
# (it calls update-rc.d, the native tool, to do the actual work).  Also
# requires sed(1) and runlevel(8).
#
# I wrote this because (a) a significant number of third-party packages
# depend on chkconfig, and (b) as an ex-Red-Hat user, I'm used to this
# interface and want it handy.

# Things one might want to configure
RUNLEVELS="1 2 3 4 5 6 S"
ONOFFDEFAULT=2345
START=20
STOP=80

currentlevel () {
   # Get the current run level
   set -- `runlevel`
   echo $2
}

explode () {
    # Explode a sequence of digits into a space-separated list
    echo "$1" | sed -e 's/[0-9A-Z]/ &/g'
}

checkroot(){
  # Privileged operation coming up, require caller to be superuser.
  if [ "$prefix" != echo -a "$EUID" -ne 0 ]
  then
    echo "chkconfig: you must be root to use this feature."
    exit 1
  fi
}

parse_init_header() {
    # Parse an LSB INIT INFO header for default start and stop levels.
    {
    state=0
	startlevels=''
	stoplevels=''
	status=1
	while read line
	do
	    #echo "Looking at" $line
	    if expr "$line" : ".*BEGIN INIT INFO" >/dev/null
	    then
		state=1
		status=0
		continue
	    fi
	    if expr "$line" : ".*END INIT INFO" >/dev/null
	    then
		state=0
		continue
	    fi
	    if [ $state = 1 ]
	    then
		t1=`expr "$line" : '.*Default-Start:[ \t]*\(.*\)'`
		if [ "$t1" != "" ]
		then
		    startlevels="$t1"
		fi
		t2=`expr "$line" : '.*Default-Stop:[ \t]*\(.*\)'`
		if [ "$t2" != "" ]
		then
		    stoplevels="$t2"
		fi
	    fi
	done
    } </etc/init.d/$1
    return $status
}

clearlevels () {
    # Clear init scripts for $name at runlevels $*
    name=$1
    shift
    for level in $*; do 
	$prefix rm -f /etc/rc[${level}].d/[SK][0-9][0-9]$name
    done
}

chkconfig_list() {
    if [ $# == 0 ]
    then
	for service in /etc/init.d/*
	do
	    # Ignoring files that aren't executable is a cheap way
	    # to skip README and other similar cruft like .dpkg-dist.
	    if [ -x $service ]
	    then
		chkconfig_list `basename $service`
	    fi
	done
    else
	printf "%-16s\t" $1
	for i in $RUNLEVELS
	do
		status="none"	# Other chkconfigs report 'off' here
		if [ -f /etc/rc$i.d/K[0-9][0-9]$1 ]
		then
			status=off
		fi
		if [ -f /etc/rc$i.d/S[0-9][0-9]$1 ]
		then
			status=on
		fi
		printf "$i:$status\t"
	done
	echo ""
    fi
}

chkconfig_add() {
    if parse_init_header $1
    then
	exec $prefix update-rc.d $1 start $START $startlevels . stop $STOP $stoplevels .
    else
	echo "chkconfig: can't --add a service with no INIT INFO header."
	exit 1
    fi
}

chkconfig_del() {
    exec $prefix update-rc.d -f $1 remove
}

chkconfig_level() {
    levels=$1
    name=$2
    directive=$3
    priority=$4
    if [ "$name" = "" ]
    then
	echo "chkconfig: requires a service name"
	exit 1
    fi
    # Query the state of a service (doesn't require root).
    if [ "$directive" = "" ]
    then
	levels=${levels:-`currentlevel`}
	if [ -f /etc/rc${level}.d/S[0-9][0-9]${1} ]
	then
	    exit 0
	else
	    exit 1
	fi
    fi
    # Turn on, turn off, or reset a service.
    checkroot
    case $directive in
    on)    levels=${levels:-$ONOFFDEFAULT}
	   clearlevels $name $levels
	   $prefix update-rc.d $name start ${priority:-$START} `explode $levels` . 
	   ;;
    off)   levels=${levels:-$ONOFFDEFAULT}
	   clearlevels $name $levels
	   $prefix update-rc.d $name stop  ${priority:-$STOP} `explode $levels` . 
	   ;;
    reset) if parse_init_header $name
	   then
	       startlevels=${startlevels:-$RESETDEFAULT} 
	       stoplevels=${stoplevels:-$RESETDEFAULT}
	       clearlevels $name ${startlevels}${stoplevels}
	       $prefix update-rc.d $name \
		    start ${priority:-$START} `explode $startlevels` . \ 
		    stop  ${priority:-$STOP}  `explode $stoplevels` . 
	   else
	       echo "chkconfig: no INIT INFO header found"
	       exit 1
	   fi 
	   ;;
    *)  echo "chkconfig: unknown operation '$directive'"; exit 1 ;;
    esac
}

if [ "$#" = 0 ]
then
    echo -en "usage:   chkconfig --list [name]\n\
         chkconfig [--dryrun] --add <name>\n\
         chkconfig [--dryrun] --del <name>\n\
         chkconfig [--dryrun] [--level <levels>] <name> [<on|off|reset>] [priority]\n"
    exit 0
fi

prefix=""
if [ "$1" = "--dryrun" ]
then
    prefix=echo
    shift
fi

case $1 in
    --list) shift; chkconfig_list $1 ;;
    --add) checkroot; shift; chkconfig_add $1 ;;
    --del) checkroot; shift; chkconfig_del $1 ;;
    --level) shift; chkconfig_level $* ;;
    *) chkconfig_level "" $* ;;
esac

Man page here: https://gist.github.com/jathanism/5892485