управление временем

# This is the most basic ntp configuration file
# The driftfile must remain in a place specific to this
# machine - it records the machine specific clock error
driftfile /etc/ntp.drift
# This obtains a random server which will be close
# (in IP terms) to the machine.  Add other servers
# as required, or change this.
server pool.ntp.org iburst dynamic
server pool.ntp.org iburst dynamic
server pool.ntp.org iburst dynamic

# Using local hardware clock as fallback
# Disable this when using ntpd -q -g -x as ntpdate or it will sync to itself
server 127.127.1.0
fudge 127.127.1.0 stratum 14
# Defining a default security setting
restrict default

server 127.127.28.0 prefer
fudge 127.127.28.0 time1 0.450 refid GPS

pool.ntp.org
pool.ntp.org
pool.ntp.org

test -x /usr/bin/ntpd -a -r /etc/ntp.conf || exit 0
# rcS contains TICKADJ
test -r /etc/default/rcS && . /etc/default/rcS
# Functions to do individual actions
settick(){                        
# If TICKADJ is set we *must* adjust it before we start, because the
# driftfile relies on the correct setting                                                                                                           
                        test -n "$TICKADJ" -a -x /usr/bin/tickadj && {
                                echo -n "Setting tick to $TICKADJ: "
                                /usr/bin/tickadj "$TICKADJ"
                                echo "done"
                       }            
}
 startdaemon(){                             
                        # The -g option allows ntpd to step the time to correct it just
                        # once.  The daemon will exit if the clock drifts too much after
                        # this.  If ntpd seems to disappear after a while assume TICKADJ
                        # above is set to a totally incorrect value.
                        echo -n "Starting ntpd: "
                        start-stop-daemon --start -x /usr/bin/ntpd -- -p /var/run/ntp.pid "$@"
                        echo "done"           
                }                    
                stopdaemon(){                                                                                                                                               
                        echo -n "Stopping ntpd: "                                                                                                                           
                        start-stop-daemon --stop -p /var/run/ntp.pid                                                                                                        
                        echo "done"                                                                                                                                         
                }                                                                                                                                                           
                                                                                                                                                                            
                case "$1" in                                                                                                                                                
                  start)                                                                                                                                                    
                        settick                                                                                                                                             
                        startdaemon -g                                                                                                                                      
                        ;;             
                  stop)                     
                        stopdaemon                                                                                                                                          
                        ;;                                                                                                                                                  
                  force-reload)                                                                                                                                             
                        stopdaemon                                                                                                                                          
                        settick                                                                                                                                             
                        startdaemon -g                                                                                                                                      
                        ;;                                                                                                                                                  
                  restart)                                                                                                                                                  
                        # Don't reset the tick here                                                                                                                         
                        stopdaemon                                                                                                                                          
                        startdaemon -g                                                                                                                                      
                        ;;                                                                                                                                                  
                  reload)                                                                                                                                                   
                        # Must do this by hand, but don't do -g                                                                                                             
                        stopdaemon                                                                                                                                          
                        startdaemon                                                                                                                                         
                        ;;                                                                                                                                                  
                  *)                                                                                                                                                        
                        echo "Usage: ntpd { start | stop | restart | reload }" >&2                                                                                          
                        exit 1                                                                                                                                              
                        ;;                                                                                                                                                  
                esac                                                                                                                                                        
                                                                                                                                                                            
                exit 0