After installing the latest Dropbox , it's indicator icon was missing in wingpanel.
You can check if the dropbox daemon is running by ( in Terminal ) :
ps -ef | grep dropbox
eric 2761 1 0 16:29 ? 00:00:09 /home/eric/.dropbox-dist/dropbox-lnx.x86_64-2.10.41/dropbox
eric 30797 30634 0 19:26 pts/0 00:00:00 grep --color=auto dropbox
There is however a simple solution :
Open Terminal and type the following :
and add the following line :
Use Ctrl+O to File Name to Write, just hit Enter and then Ctrl+X to Exit.
And then in the same Terminal :
dropbox stop && dropbox start -i &
( Or logout and login again...).
Another way is by adding the same line to the file ~/.bashrc or the file /etc/profile ( as administrator ). After that follow same procedure as above.
Instructions to change the blue dropbox indicator icon to a nicer one can be found on this page.