https://tex.stackexchange.com/questions ... ect=1&lq=1
but this does not seem to work.
I am working on Ubuntu 14.04
Here is a M(N)WE:

And here is the message I got:
! fontspec error: "font-not-found"
!
! The font "Cardo" cannot be found.
!
! See the fontspec documentation for further information.
!
! For immediate help type H <return>.
!...............................................
l.3 \setmainfont{Cardo}
%SBL BibLit; Linux Libertine O; Cardo
|'''''''''''''''''''''''''''''''''''''''''''''''
| A font might not be found for many reasons.
| Check the spelling, where the font is installed etc. etc.
|
| When in doubt, ask someone for help!
|...............................................
.................................................
. fontspec info: "no-scripts"
.
. Font Cardo does not contain any OpenType `Script' information.
.................................................
\g_fontspec_family_Cardo_int=\count123
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! fontspec error: "font-not-found"
!
! The font "Cardo" cannot be found.
!
! See the fontspec documentation for further information.
!
! For immediate help type H <return>.
!...............................................
l.3 \setmainfont{Cardo}
|'''''''''''''''''''''''''''''''''''''''''''''''
| A font might not be found for many reasons.
| Check the spelling, where the font is installed etc. etc.
|
| When in doubt, ask someone for help!
|...............................................
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font Cardo/B (it probably doesn't exist).
.................................................
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font Cardo/I (it probably doesn't exist).
.................................................
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font Cardo/BI (it probably doesn't exist).
.................................................
.................................................
. fontspec info: "defining-font"
.
. Font family 'Cardo(0)' created for font 'Cardo' with options [].
.
. This font family consists of the following shapes:
.
. * 'normal' with NFSS spec.:
. <->"Cardo:"
.................................................
! Font EU1/Cardo(0)/m/n/10=Cardo: at 10.0pt not loadable: Metric (TFM) file or
installed font not found.
<to be read again>
relax
l.3 \setmainfont{Cardo}
I wasn't able to read the size data for this font,
so I will ignore the font specification.
[Wizards can fix TFM files using TFtoPL/PLtoTF.]
You might try inserting a different font spec;
e.g., type `I\font<same font id>=<substitute font name>'.
How do I get the