Commands tagged brightness (7)

  • [UPDATE: Now works for multiple connected outputs] I woke up around midnight with an urge to do some late night hacking, but I didn't want a bright monitor screwing up my body's circadian rhythm. I've heard that at night blue (short wavelength) lights are particularly bad for your diurnal clock. That may be a bunch of hooey, but it is true that redder (longer wavelength) colors are easier on my eyes at night. This command makes the screen dimmer and adjusts the gamma curves to improve contrast, particularly darkening blues and greens (Rɣ=2, Gɣ=3, Bɣ=4). To reset your screen to normal, you can run this command: xrandr | sed -n 's/ connected.*//p' | xargs -n1 -tri xrandr --output {} --brightness 1 --gamma 1:1:1 or, more briefly, xgamma -g 1 Note: The sed part is fragile and wrong. I'm doing it this way because of a misfeature in xrandr(1), which requires an output be specified but has no programmatic way of querying available outputs. Someone needs to patch up xrandr to be shell script friendly or at least add virtual outputs named "PRIMARY" and "ALL". . Todo: Screen should dim (gradually) at sunset and brighten at sunrise. I think this could be done with a self-resubmitting at job, but I'm running into the commandlinefu 127 character limit just getting the sunrise time: wget --post-data=$(date "+xxy=%Y&xxm=%m&xxd=%d")"&st=WA&place=Seattle" -q -O- | sed -rn 's/\W*Sunrise\W*(.*)/\1/p' I hope some clever hacker comes up with a command line interface to Google's "OneBox", since the correct time shows up as the first hit when googling for "sunrise:cityname". . [Thank you to @flatcap for the sed improvement, which is much better than the head|tail|cut silliness I had before. And thank you to @braunmagrin for pointing out that the "connected" output may not be on the second line.] Show Sample Output

    xrandr | sed -n 's/ connected.*//p' | xargs -n1 -tri xrandr --output {} --brightness 0.7 --gamma 2:3:4
    hackerb9 · 2010-10-24 10:45:57 7

  • 3
    xbacklight -10%
    totti · 2013-01-17 17:53:05 0
  • Redshift will adjust the color temperature and protects eye at night -b : will adjust the brightness

    redshiftgui -o -b 0.5
    totti · 2012-02-26 16:10:02 0
  • I'm not sure what apt this is, but it seems to work on most X screens, an is useful for saving power, and not straining your eyes Show Sample Output

    xbacklight -set 50
    gabe240 · 2014-02-07 12:03:57 0

  • 1
    dbus-send --session --print-reply --dest="org.gnome.SettingsDaemon" /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.SetPercentage uint32:30
    totti · 2013-02-04 11:21:07 0
  • xrandr --output <outputname> --brightness <value> If the driver of your graphics card supports it, then you can use xrandr. The following command lists the current configuration: xrandr --current --verbose If you want to change the configuration of an output, then you need the name of the output. This name is part of the output of xrandr --current, for example LVDS1. The brightness can be changed like this: xrandr --output <outputname> --brightness 0.8 Gamma: xrandr --output <outputname> --gamma 0.5:1.0:1.0

    xrandr --output LVDS1 --brightness 0.4
    totti · 2013-02-04 11:00:16 4
  • alias screen-brightness='xbacklight -set' alias screen-off='xset dpms force standby' alias screen-min='xbacklight -set 1' alias screen-max='xbacklight -set 100' alias screen-inc='xbacklight -inc 10' alias screen-dec='xbacklight -dec 10'

    xbacklight -set 100
    asdzxc · 2015-02-08 12:12:16 0

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

list files recursively by size

Recompress all .gz files in current directory using bzip2 running 1 job per CPU core in parallel

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Avoid killing the X server with CTRL+C on the tty it was started from

Export all Mailman mailing lists Members to separate .txt files
Export all Mailman mailing lists Members to separate .txt files excluding "Mailman" and "Test" or add yours by && $1!="myDontWannaList"

Compare a remote file with a local file

wget with resume
I couldn't find this on the site and it's a useful switch. Great for large files.

Retrieve a list of all webpages on a site
This spiders the given site without downloading the HTML content. The resulting directory structure is then parsed to output a list of the URLs to url-list.txt. Note that this can take a long time to run and you make want to throttle the spidering so as to play nicely.

reset hosed terminal

preprocess code to be posted in comments on this site
Assuming that $script contains the filename of a script you'd like to post as part of a comment on this site, this will prefix each line with '$' and pipe it into the X selection. From there just put the cursor in the right place in the comments box and middle-click. Should work pretty much anywhere with xclip installed. On debian-ish systems this is installed as part of the package "xclip".

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: