说明：
  MATE桌面环境在使用中会优化一些参数配置，例如：电源选项、屏幕配置、字体配置、终端模拟器（Mate Terminal）配置等等。
  通常工程师会根据自己喜好调整一些参数，修改后参数的保存位置在/home/username/.config/dconf/user，同时缓存文件会保留在/home/username/.cache/dconf/user中，当删除这两处user文件会重新加载系统默认配置。所以配置加载的顺序是：/home/username/.config/dconf/user–>系统默认配置。

系统默认参数配置位置

/usr/share/glib-2.0/schemas/	# 此目录可以通过grep来查找需要调整参数

例如：调整Scrollback参数

cd /usr/share/glib-2.0/schemas/
grep -ir "scrollback" .

Binary file ./gschemas.compiled matches
./org.gnome.Terminal.gschema.xml:    <key name="scrollback-lines" type="i">
./org.gnome.Terminal.gschema.xml:      <summary>Number of lines to keep in scrollback</summary>
./org.gnome.Terminal.gschema.xml:      <description>Number of scrollback lines to keep around. You can scroll back in the terminal by this number of lines; lines that don’t fit in the scrollback are discarded. If scrollback_unlimited is true, this value is ignored.</description>
./org.gnome.Terminal.gschema.xml:    <key name="scrollback-unlimited" type="b">
./org.gnome.Terminal.gschema.xml:      <summary>Whether an unlimited number of lines should be kept in scrollback</summary>
./org.gnome.Terminal.gschema.xml:      <description>If true, scrollback lines will never be discarded. The scrollback history is stored on disk temporarily, so this may cause the system to run out of disk space if there is a lot of output to the terminal.</description>
./org.mate.terminal.gschema.xml:    <key name="scrollback-lines" type="i">
./org.mate.terminal.gschema.xml:      <summary>Number of lines to keep in scrollback</summary>
./org.mate.terminal.gschema.xml:      <description>Number of scrollback lines to keep around. You can scroll back in the terminal by this number of lines; lines that don't fit in the scrollback are discarded. If scrollback_unlimited is true, this value is ignored.</description>
./org.mate.terminal.gschema.xml:    <key name="scrollback-unlimited" type="b">
./org.mate.terminal.gschema.xml:      <summary>Whether an unlimited number of lines should be kept in scrollback</summary>
./org.mate.terminal.gschema.xml:      <description>If true, scrollback lines will never be discarded.  The scrollback history is stored on disk temporarily, so this may cause the system to run out of disk space if there is a lot of output to the terminal.</description>

vim org.mate.terminal.gschema.xml

    </key>
    <key name="scrollback-lines" type="i">
      <default>10000</default>		# 这里加载默认值
      <summary>Number of lines to keep in scrollback</summary>
      <description>Number of scrollback lines to keep around. You can scroll back in the terminal by this number of lines; lines that don't fit in the scrollback are discarded. If scrollback_unlimited is true, this value is ignored.</description>
    </key>
    <key name="scrollback-unlimited" type="b">
      <default>false</default>			# 关闭这里是禁用unlimited
      <summary>Whether an unlimited number of lines should be kept in scrollback</summary>
      <description>If true, scrollback lines will never be discarded.  The scrollback history is stored on disk temporarily, so this may cause the system to run out of disk space if there is a lot of output to the terminal.</description>

修改完文件后，需要重新编译 GSettings 模式：

glib-compile-schemas /usr/share/glib-2.0/schemas/

重新登录后生效

小结：
  全用户生效，已创建用户需要更新/home/username/.config/dconf/user，新用户可加载默认配置。