Redshift (software)

<h2 id="features">Features</h2>
Redshift is primarily distributed for and used on the <a href="/facts/Linux/9FvCKSTq">Linux</a> <a href="/facts/Operating_system/8XTuvMh2">operating system</a>.
Redshift can be used to set a single color temperature and brightness ("one-shot mode") or can adjust the temperature and brightness continuously to follow the <a href="/facts/Solar_elevation/mwzmcUW6">Sun's elevation</a>, in which case it will transition to the night color temperature settings near <a href="/facts/Twilight/hNUKeCT8">twilight</a>. The temperature and brightness settings for daytime and night can be user-configured.
To determine the <a href="/facts/Solar_elevation/mwzmcUW6">Sun's elevation</a>, the software requires the user's location in form of <a href="/facts/Geographic_coordinate/RkjfcY6k">latitude and longitude</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2">2</a>
On Linux and <a href="/facts/BSD/XQKcURrh">BSD</a> operating systems, Redshift supports multiple monitors through the <a href="/facts/X_Window_System/ac2vRIQL">X</a> extensions <a href="/facts/RandR/7AaPmYtV">RandR</a> (preferred) or VidMode, or through the <a href="/facts/Direct_Rendering_Manager/AjCBBvrU">Direct Rendering Manager</a>. Because Redshift can only be configured to use the same <a href="/facts/Gamma_correction/cApBLTYj">gamma correction</a> on all monitors it controls, it is usually desirable to run one instance of the program per monitor.

<h3>Interfaces</h3>
Redshift originally had only a <a href="/facts/Command-line_interface/R9JpGmXQ">command-line interface</a>, but now has <a href="/facts/Graphical_user_interface/wBlQFWDP">graphical user interfaces</a> (GUIs) that support most Linux desktop environments. Those GUIs include redshift-gtk, redshift-plasmoid, and nightshift.
redshift-gtk is included in Redshift's source tree. In addition to a windowed interface, it provides a tray status icon that can enable or disable Redshift or adjust the screen's color temperature automatically.
Redshift can be opened with the use of terminal, panel launchers or startup commands: the command redshift -O #TEMP (#TEMP being the color temperature in kelvins, from 1000 to 25000) will set the temperature, and the command redshift -x to exit Redshift.
A simple script can be made and called upon to set the color temperature manually via a shortcut or panel launcher:

<ol><li>Create a new file and copy in the following:#!/bin/bash
shouldloop=true;
while $shouldloop; do
 read -p "What temp would you like? 1000-25000K: " scale

if "$scale" -ge 1000 && "$scale" -le 25000; then
 redshift -O $scale
 shouldloop=false;
 elif $scale = "x"; then
 exit
 elif $scale = "X"; then
 exit
 else
 echo "Invalid value or outside range. x to exit..."
 fi
done
</li>
<li>Save the file in your /home/$user directory.</li>
<li>Change the properties of the file so it can be executed (using <a href="/facts/Chmod/aGRdWvvk">chmod</a> or context menu permissions).</li>
<li>Create a new launcher ("set temp") referring to the file you have named above and select "Open in Terminal".</li>
<li>Create a new launcher ("exit redshift") with the command redshift -x (no need to open this in terminal).</li>
<li>Use the launcher to set temperature or exit Redshift.</li></ol>
<h2 id="forks">Forks</h2>
Since 14 Jun 2020, Redshift development has been abandoned.
Since 27 August 2023, <a href="/facts/Debian/cBd93qfJ">Debian</a> users are recommended to use gammastep, a Redshift fork, instead.<a class="footnote-ref" id="fnref:3" href="#fn:3">3</a><a class="footnote-ref" id="fnref:4" href="#fn:4">4</a><a class="footnote-ref" id="fnref:5" href="#fn:5">5</a>

<h2 id="reviews">Reviews</h2>
Redshift has been positively reviewed by Linux users,<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a><a class="footnote-ref" id="fnref:7" href="#fn:7">7</a><a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> who note that Redshift has some installation and user interface advantages compared to the <a href="/facts/F.lux/aemGKTEa">f.lux</a> Linux port <a href="/facts/XFlux/aemGKTEa">xflux</a>. However, f.lux's systems have since been updated to enhance its dimmed display.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a>
<a href="/facts/Ubuntu_MATE/pT5l4Px2">Ubuntu MATE</a> provides Redshift installed by default since their 17.10 release.<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>
<a href="/facts/Linux_Mint/PDwNIUfT">Linux Mint</a> Cinnamon provides Redshift installed by default since their 18.3 release.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> Since development of Redshift has been abandoned, Linux Mint is looking for a replacement.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/F.lux/aemGKTEa">F.lux</a></li>
<li><a href="/facts/Red_Moon_(software)/IKm7EatI">Red Moon (software)</a></li>
<li><a href="/facts/Night_Shift_(software)/PXTbk8PI">Night Shift (software)</a> – a feature of macOS and iOS that provides a similar function</li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://github.com/jonls/redshift">Project website</a> on <a href="/facts/GitHub/n1hNCsc3">GitHub</a></li>
<li><a href="https://gitlab.com/chinstrap/gammastep">gammastep</a> on <a href="/facts/GitLab/3CCW9luS">GitLab</a> (Redshift fork)</li>
<li><a href="https://github.com/faf0/sct">Xsct</a> on <a href="/facts/GitHub/n1hNCsc3">GitHub</a> (a minimalistic Redshift and f.lux implementation for <a href="/facts/X11/ac2vRIQL">X11</a>)</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Github release 1.9. <a href="https://github.com/jonls/redshift/releases/tag/v1.9" target="_blank">https://github.com/jonls/redshift/releases/tag/v1.9</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Github release 1.9. <a href="https://github.com/jonls/redshift/releases/tag/v1.9" target="_blank">https://github.com/jonls/redshift/releases/tag/v1.9</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">"Chinstrap / gammastep · GitLab". GitLab. Retrieved 9 September 2024. <a href="https://gitlab.com/chinstrap/gammastep" target="_blank">https://gitlab.com/chinstrap/gammastep</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">"Redshift - Debian Wiki". wiki.debian.org. Retrieved 9 September 2024. <a href="https://wiki.debian.org/Redshift" target="_blank">https://wiki.debian.org/Redshift</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">"Redshift is Deprecated and no longer maintained anymore. Use gammastep As Replacement In Future Releases · linuxmint · Discussion #174". GitHub. Retrieved 9 September 2024. <a href="https://github.com/orgs/linuxmint/discussions/174" target="_blank">https://github.com/orgs/linuxmint/discussions/174</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Gordon, Whitson (18 June 2010). "RedShift Makes Your Screen Easier on the Eyes at Night". LifeHacker. Retrieved 20 April 2020. <a href="https://lifehacker.com/redshift-makes-your-screen-easier-on-the-eyes-at-night-5567172" target="_blank">https://lifehacker.com/redshift-makes-your-screen-easier-on-the-eyes-at-night-5567172</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Popov, Dmitri. "Improve Your Night Sleep with Redshift and F.lux". Linux Magazine. Retrieved 20 April 2020. <a href="https://www.linux-magazine.com/Online/Blogs/Productivity-Sauce/Improve-Your-Night-Sleep-with-Redshift-and-F.lux" target="_blank">https://www.linux-magazine.com/Online/Blogs/Productivity-Sauce/Improve-Your-Night-Sleep-with-Redshift-and-F.lux</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Pot, Justin (17 June 2010). "Redshift Keeps Your Eyes Sharp & Helps You Sleep [Linux]". MakeUseOf. Retrieved 20 April 2020. <a href="https://www.makeuseof.com/tag/redshift-eyes-sharp-helps-sleep-linux/" target="_blank">https://www.makeuseof.com/tag/redshift-eyes-sharp-helps-sleep-linux/</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Gordon, Whitson (18 June 2010). "RedShift Makes Your Screen Easier on the Eyes at Night". LifeHacker. Retrieved 20 April 2020. <a href="https://lifehacker.com/redshift-makes-your-screen-easier-on-the-eyes-at-night-5567172" target="_blank">https://lifehacker.com/redshift-makes-your-screen-easier-on-the-eyes-at-night-5567172</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Wimpress, Martin (28 July 2017). "Ubuntu MATE 17.10 Alpha 2". Ubuntu MATE. Retrieved 8 August 2017. <a href="https://ubuntu-mate.org/blog/ubuntu-mate-artful-alpha2/" target="_blank">https://ubuntu-mate.org/blog/ubuntu-mate-artful-alpha2/</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">"New features in Linux Mint 18.3 Cinnamon". Linux Mint. Retrieved 1 December 2017. <a href="https://www.linuxmint.com/rel_sylvia_cinnamon_whatsnew.php" target="_blank">https://www.linuxmint.com/rel_sylvia_cinnamon_whatsnew.php</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">"Redshift is Deprecated and no longer maintained anymore. Use gammastep As Replacement In Future Releases · linuxmint · Discussion #174". GitHub. Retrieved 9 September 2024. <a href="https://github.com/orgs/linuxmint/discussions/174" target="_blank">https://github.com/orgs/linuxmint/discussions/174</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
</ol>

Redshift (software) open-in-new

Redshift (software)