username is not in sudoers folder
About installing the plugin of the Adobe Flash Player for Firefox,I know
the file of libflashplayer.so should be copied to
/usr/lib64/mozilla/plugin.By Terminal,after I input the command of sudo
cp libflashplayer.so /usr/lib64/mozilla/plugins,the result is username
is not in sudoers folder,this will be reported ： What should I do ?