# ls -l /usr/X11R6/lib/modules/extensions/libglx.so
lrwxrwxrwx 1 root root 22 Мар 29 18:25 /usr/X11R6/lib/modules/extensions/libglx.so -> /etc/X11/lib/libglx.so
[root@bone ~]# ls -l /etc/X11/lib/libglx.so
lrwxrwxrwx 1 root root 53 Апр  4 13:50 /etc/X11/lib/libglx.so -> ../../../usr/lib/X11/modules/extensions/libglx-x11.so
[root@bone ~]# ls -l /usr/lib/X11/modules/extensions/libglx-x11.so
-rw-r--r-- 1 root root 391600 Фев 15 18:38 /usr/lib/X11/modules/extensions/libglx-x11.so
[root@bone ~]# rpm -qf /usr/lib/X11/modules/extensions/libglx-x11.so
xorg-x11-extensions-glx-1.0.1-alt12