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Linux dollar sign in front of directory

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# 1  
Old 06-13-2018
Linux dollar sign in front of directory

I'm looking at a config file with dollar signs. What do the dollar signs mean in front of a directory?

dir = ./demoCA # Where everything is kept
certs = $dir/certs # Where the issued certs are kept
crl_dir = $dir/crl # Where the issued crl are kept
new_certs_dir = $dir/newcerts # default place for new certs.

# 2  
Old 06-13-2018
Config files can be read and used by different kinds programs, not just bash. That config file would fail miserably as a bash script based just on the use of spaces.

It seems to me it means translate (or substitute) the string that is stored in the dir variable - kind of like dereferencing if you will. The author probably figured that $ prepend would improve reading clarity for us UNIX types. Maybe not.

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