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1. On default,mysql's root remote access has no password. so we should set it in the following way: mysql -uroot -p use mysql; select Host,User,Password from users; Here we can see only the localhost's password was set, use this command to reset all the password : update user set password=PASSWORD('bioequpms') where user='root'; flush privileges; 2.error on linaro arm running qt5 application.   cross compile qt5 library,and use qmake to recompile the application. copy them(bin + libs) to arm,run get the following error:    This application failed to start because it could not find or load the Qt platform plugin "xcb". Reinstalling the application may fix this problem.    so I will the /home/linaro/qt5emb/plugins/platforms directory,there is no xcb library. exists libraries are :     libqlinuxfb.so libqminimal.so libqoffscreen.so I check the OpenSuse13.2 64bit Qt5.3.2,in this directory /home/shell.albert/tools/Qt5.3.2/Tools/QtCreatory/bin/plugins/platforms libqeglfs.so libqminimalegl.so libqoffscreen.so libqlinuxfb.so libqminimal.so libqxcb.so The plugin path was specified in qt.conf file. now the problem is clear,I should cross compile qt5 library again with xcb support. ./configure --help -qt-xcb -system-xcb -no-xcb-xlib -no-xcb -xcb -no-eglfs -eglfs

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