Ubuntu PDF Reader

1. The upgrade encountered Could not perform immediate configuration python2.7-minimal, paused.

Add-o apt::immediate-configure=0 to the apt-get command to temporarily ban the check.

PDF Reader Okular under 2.ubuntu

sudo apt-get install Okular

sudo apt-get install Poppler-data

If not yet, enter again

sudo apt-get install poppler-utils

If not, it may be because some PDF files do not explicitly indicate the font, the system will be displayed by default in English font, resulting in Chinese font display failure.

The solution is:

sudo vi/etc/fonts/conf.d/49-sansserif.conf

Put
<edit name= "Family" mode= "Append_last" >
<string>sans-serif</string>
</edit>

Switch
<edit name= "Family" mode= "Append_last" >
<string>monospace</string>
</edit>

If the modified font monospace still cannot be displayed, you can change it to a Arial display.

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http://forum.ubuntu.org.cn/viewtopic.php?t=293328

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