ubuntu comes pdf reader no way mark, taking notes;
Download and install okular may be possible, but only when the selected text is a rectangular box like, with them particularly awkward, after careful comparison, finally found before or at the windows with Foxit easy to use ah,
And foxit also offers its own version of Linux, and just before the discovery of Baidu Cloud Linux client as a surprise Well, did not talk much, the installation process is as follows, the basic problem does not occur.
Download: https://www.foxitsoftware.com/downloads/
Installation process:
$ cd /tmp $ gzip -d FoxitReader_version_Setup.run.tar.gz $ tar -xvf FoxitReader_version_Setup.run.tar $ ./FoxitReader_version_Setup.run
It is assumed that the download directory is / tmp