在使用matlab过程中，出现Failed to load module "canberra-gtk-module"的提示信息，打算看下相关软件是否安装，使用命令：
locate libcanberra bash: locate：未找到命令
说明locate没有安装，解决方式如下：
1、安装软件：
pacman -S mlocate
2、更新数据库：
updatedb
3、查看文件信息：
1 locate libcanberra 2 /etc/X11/xinit/xinitrc.d/40-libcanberra-gtk-module.sh 3 /usr/lib/libcanberra-0.30 4 /usr/lib/libcanberra-gtk.so 5 /usr/lib/libcanberra-gtk.so.0 6 /usr/lib/libcanberra-gtk.so.0.1.9 7 /usr/lib/libcanberra-gtk3.so 8 /usr/lib/libcanberra-gtk3.so.0 9 /usr/lib/libcanberra-gtk3.so.0.1.9 10 /usr/lib/libcanberra.la 11 /usr/lib/libcanberra.so 12 /usr/lib/libcanberra.so.0 13 /usr/lib/libcanberra.so.0.2.5 14 /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so 15 /usr/lib/gtk-3.0/modules/libcanberra-gtk-module.so 16 /usr/lib/gtk-3.0/modules/libcanberra-gtk3-module.so 17 /usr/lib/libcanberra-0.30/libcanberra-alsa.la 18 /usr/lib/libcanberra-0.30/libcanberra-alsa.so 19 /usr/lib/libcanberra-0.30/libcanberra-gstreamer.la 20 /usr/lib/libcanberra-0.30/libcanberra-gstreamer.so 21 /usr/lib/libcanberra-0.30/libcanberra-multi.la 22 /usr/lib/libcanberra-0.30/libcanberra-multi.so 23 /usr/lib/libcanberra-0.30/libcanberra-null.la 24 /usr/lib/libcanberra-0.30/libcanberra-null.so 25 /usr/lib/libcanberra-0.30/libcanberra-pulse.la 26 /usr/lib/libcanberra-0.30/libcanberra-pulse.so 27 /usr/lib/pkgconfig/libcanberra-gtk.pc 28 /usr/lib/pkgconfig/libcanberra-gtk3.pc 29 /usr/lib/pkgconfig/libcanberra.pc 30 /usr/lib32/libcanberra-0.30 31 /usr/lib32/libcanberra-gtk.so 32 /usr/lib32/libcanberra-gtk.so.0 33 /usr/lib32/libcanberra-gtk.so.0.1.9 34 /usr/lib32/libcanberra-gtk3.so 35 /usr/lib32/libcanberra-gtk3.so.0 36 /usr/lib32/libcanberra-gtk3.so.0.1.9 37 /usr/lib32/libcanberra.so 38 /usr/lib32/libcanberra.so.0 39 /usr/lib32/libcanberra.so.0.2.5 40 /usr/lib32/gtk-2.0/modules/libcanberra-gtk-module.so 41 /usr/lib32/gtk-3.0/modules/libcanberra-gtk-module.so 42 /usr/lib32/gtk-3.0/modules/libcanberra-gtk3-module.so 43 /usr/lib32/libcanberra-0.30/libcanberra-alsa.la 44 /usr/lib32/libcanberra-0.30/libcanberra-alsa.so 45 /usr/lib32/libcanberra-0.30/libcanberra-gstreamer.la 46 /usr/lib32/libcanberra-0.30/libcanberra-gstreamer.so 47 /usr/lib32/libcanberra-0.30/libcanberra-multi.la 48 /usr/lib32/libcanberra-0.30/libcanberra-multi.so 49 /usr/lib32/libcanberra-0.30/libcanberra-null.la 50 /usr/lib32/libcanberra-0.30/libcanberra-null.so 51 /usr/lib32/libcanberra-0.30/libcanberra-pulse.la 52 /usr/lib32/libcanberra-0.30/libcanberra-pulse.so 53 /usr/lib32/pkgconfig/libcanberra-gtk.pc 54 /usr/lib32/pkgconfig/libcanberra-gtk3.pc 55 /usr/lib32/pkgconfig/libcanberra.pc 56 /usr/share/gtk-doc/html/libcanberra 57 /usr/share/gtk-doc/html/libcanberra/ch01.html 58 /usr/share/gtk-doc/html/libcanberra/home.png 59 /usr/share/gtk-doc/html/libcanberra/index.html 60 /usr/share/gtk-doc/html/libcanberra/left-insensitive.png 61 /usr/share/gtk-doc/html/libcanberra/left.png 62 /usr/share/gtk-doc/html/libcanberra/libcanberra-canberra-gtk.html 63 /usr/share/gtk-doc/html/libcanberra/libcanberra-canberra.html 64 /usr/share/gtk-doc/html/libcanberra/libcanberra.devhelp2 65 /usr/share/gtk-doc/html/libcanberra/right-insensitive.png 66 /usr/share/gtk-doc/html/libcanberra/right.png 67 /usr/share/gtk-doc/html/libcanberra/style.css 68 /usr/share/gtk-doc/html/libcanberra/up-insensitive.png 69 /usr/share/gtk-doc/html/libcanberra/up.png 70 /usr/share/vala/vapi/libcanberra-gtk.vapi 71 /usr/share/vala/vapi/libcanberra.vapi
说明文件是存在的，文件找不到，建立个软链接就行了。（这里matlab有个大坑，默认使用gtk2的，不要使用gtk3）
ln -s /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so /usr/lib/libcanberra-gtk-module.so
好了，到此结束了，就可以愉快的matlab了。