DragonFly On-Line Manual Pages

REDSHIFT:(1)                     User Commands                    REDSHIFT:(1)

NAME
       redshift - Set color temperature of display according to time of day.

SYNOPSIS
       redshift -l LAT:LON -t DAY:NIGHT [OPTIONS...]

DESCRIPTION
       redshift adjusts the color temperature of your screen according to your
       surroundings. This may help your eyes hurt less if you are working in
       front of the screen at night.

       The color temperature is set according to the position of the sun. A
       different color temperature is set during night and daytime. During
       twilight and early morning, the color temperature transitions smoothly
       from night to daytime temperature to allow your eyes to slowly adapt.

OPTIONS
       -h     Display this help message

       -v     Verbose output

       -V     Show program version

       -b N   Screen brightness to apply (max is 1.0)

       -c FILE
              Load settings from specified configuration file

       -g R:G:B
              Additional gamma correction to apply

       -l LAT:LON
              Your current location

       -l PROVIDER
              Select provider for automatic location updates (Type `list' to
              see available providers)

       -m METHOD
              Method to use to set color temperature (Type `list' to see
              available methods)

       -o     One shot mode (do not continously adjust color temperature) -O
              TEMP One shot manual mode (set color temperature)

       -x     Reset mode (remove adjustment from screen)

       -r     Disable temperature transitions

       -t DAY:NIGHT
              Color temperature to set at daytime/night

       The neutral temperature is 6500K. Using this value will not change the
       color temperature of the display. Setting the color temperature to a
       value higher than this results in more blue light, and setting a lower
       value will result in more red light.

       Default values:

              Daytime temperature: 5500K Night temperature: 3700K

EXAMPLE
       Example for Copenhagen, Denmark:

              $ redshift -l 55.7:12.6 -t 5700:3600 -g 0.8 -m vidmode -v

AUTHOR
       redshift was written by Jon Lund Steffensen <jonlst@gmail.com>.

       Both redshift and this manual page are released under the GNU General
       Public License, version 3.

BUGS
       Please report bugs to <https://bugs.launchpad.net/redshift>

KNOWN ISSUES
       Redshift won't affect the color of your cursor when your graphics
       driver is configured to use hardware cursors. Some graphics drivers
       have an option to disable hardware cursors in xorg.conf.

redshift                          August 2010                     REDSHIFT:(1)