did you receive a doc or docx file with an extra .p7s extension ? it’s a digitally signed document
in order to read it in ubuntu you’ll have to transform it back to the regular .doc or .docx file
here’s how to do this:
- download the file
- open a terminal (CTRL+ALT+t)
- use cd to get to the folder where you downloaded the file
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cd Downloads |
- copy this line in the terminal (mouse right click) and modify the .p7s file name
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openssl smime -inform DER -verify -noverify -in file.docx.p7s -out file.docx |
now you have the file without the .p7s extension in the same folder you have the original file