Looks like you've got a config file. What you could do is similar to what Adam Siemeon/slm suggest:
sed -nr 's/[^=]+=\s*(.+)$/\1/p' filename
[^=] excludes all '=' characters,
+ says one or more of the same type of character, this followed by an actual
\s any whitespace (including tabs
\t and new lines
\r\n, and plain spaces ' ', whereas
* means zero or more of the same type, parentheses catch what's inside to place the matched character sequences into the \1, \2, ..., \n replacement placeholders,
$ means the end of a line. This follows the typical replacement pattern of:
s/.../.../modifiers. The command line option
-r stands for extended regex syntax (as a matter of convenience) and
-n means output nothing until or unless explcitly requested. The
p modifier prints out the result.
You could make a global search with the
g modifier like:
sed -nr 's/[^=]+=\s*(.+)$/\1 /pg' filename # note the space after \1
so that you get a string separated by
' ' (could be
\t, or what have you) which you can process easily.
Both is valid provided your values preceded by the equation character span up to the end of a line and are not followed by comments or other characters with semantics deviating from a simple "value".
I can't comment here yet on other's posts. To indicate the line just pass the line number, in your case 3, before
s or before the initiating quote char (just like in vim).
sed -nr '3s/[^=]+=\s*(.+)$/\1/p' filename
Please take a look at
info sed. For example, 3.2 and 4.7 are of particular interest to you.