I want to use this command:
sed 's/account.db/$PATH/' file1 > file2
and
sed 's/account.db/$PATH.account.db/' file3 > file4
But I dont know how to use it.
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Replace your single quotes with double quotes. (see [Difference between single and double quotes in Bash](http://stackoverflow.com/questions/6697753/difference-between-single-and-double-quotes-in-bash)) – David Myers Mar 03 '17 at 20:38
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@Zanna i changed ' by " but it has error – ahmad Mar 03 '17 at 20:38
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@Zanna this error:sed: -e expression #1, char 15: unknown option to `s' – ahmad Mar 03 '17 at 20:40
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You need to use a different delimiter because the PATH contains `/` characters. Do it like this `sed "s#foo#$bar#"` (oops the PATH has colons too!) – Zanna Mar 03 '17 at 20:41