I tried to install Dropbox on my PC running Archlinux and I followed the command at Dropbox webpage. The first command is ok, but when I tried the second command, it gives me the error: Couldn't start Dropbox.  This is usually because of a permissions error. Storing your home folder on a network share can also cause an error.Get more help at https://www.dropbox.com/c/help/permissions_errorPlease contact Dropbox support with the following info for help:/tmp/dropbox_errordHVSQm.txtI have tried to do it with sudo but it gave the same error. Please help me. Thanks. 
Dropbox installation stuck with permission
permissions;arch linux;dropbox