Hi all,
On Sat, 03 Sep 2011 17:15:51 -0400
Shawn H Corey <[email protected]> wrote:
> On 11-09-03 05:01 PM, Jon Forsyth wrote:
> > Hello,
> >
> > According to the grep manual page I can use the -P option to use Perl
> > regular expressions as follows:
> >
> > grep -P PERL_REGEX INPUT_FILE
> >
> > however, I cannot get the following pattern to match a literal dollar sign:
> >
> > grep -P makan\$ file.txt
>
> # You have to get the backslash past the shell
>
> grep -P 'makan\$' file.txt
>
> # or
>
> grep -P makan\\$ file.txt
>
Just to be a bit more pedantic, in this case:
grep -P makan\\\$ file.txt
would be safer and more idiomatic, because otherwise the shell would treat the
string as a literal backslash followed by the opening of a shell variable,
which all start with "$".
Regards,
Shlomi Fish
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