euse: add page (#15009)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/linux/euse.md

@@ -0,0 +1,24 @@
+# euse
+
+> Enable, disable, and obtain information about Gentoo USE flags.
+> More information: <https://wiki.gentoo.org/wiki/Euse>.
+
+- List active global USE flags:
+
+`euse --active --global`
+
+- List active local USE flags:
+
+`euse --active --local`
+
+- Enable a global USE flag:
+
+`sudo euse --enable {{use_flag}}`
+
+- Disable a global USE flag (put a '-' sign in front of the USE flag):
+
+`sudo euse --disable {{use_flag}}`
+
+- Remove a global USE flag:
+
+`sudo euse --prune {{use_flag}}`