Comments on: BASH Script – Blank Out CC Details http://www.adamsinfo.com/bash-script-blank-out-cc-details/ Adam Palmer MBCS CITP, Linux, PHP Programmer, MySQL Developer, Embedded Hardware, Security Consultant Mon, 15 Mar 2010 13:13:43 +0000 http://wordpress.org/?v=2.8.4 hourly 1 By: Jadu Saikia http://www.adamsinfo.com/bash-script-blank-out-cc-details/comment-page-1/#comment-1096 Jadu Saikia Mon, 07 Dec 2009 16:48:12 +0000 http://www.adamsinfo.com/?p=803#comment-1096 How about this ? $ echo "123456789" | sed -r "s/^(.{0})(.{5})/\1XXXXX/" Output: XXXXX6789 http://unstableme.blogspot.com/2008/01/substitute-character-by-position-sed.html // Jadu How about this ?

$ echo “123456789″ | sed -r “s/^(.{0})(.{5})/\1XXXXX/”

Output:
XXXXX6789

http://unstableme.blogspot.com/2008/01/substitute-character-by-position-sed.html

// Jadu

]]> By: Carsten http://www.adamsinfo.com/bash-script-blank-out-cc-details/comment-page-1/#comment-924 Carsten Thu, 29 Oct 2009 14:01:20 +0000 http://www.adamsinfo.com/?p=803#comment-924 I'm with Wesley here. Why iterate with (poorly performing) bash, when you can use faster Perl Regular Expressions in a single command instead? Using perl instead of sed, you can get the regex even shorter (and it's platform-independent as sed takes different parameters on Linux and OSX for extended regular expressions). Example here: http://pastebin.com/f12cc8612 I’m with Wesley here. Why iterate with (poorly performing) bash, when you can use faster Perl Regular Expressions in a single command instead?

Using perl instead of sed, you can get the regex even shorter (and it’s platform-independent as sed takes different parameters on Linux and OSX for extended regular expressions).

Example here: http://pastebin.com/f12cc8612

]]> By: Wesley Shields http://www.adamsinfo.com/bash-script-blank-out-cc-details/comment-page-1/#comment-918 Wesley Shields Wed, 28 Oct 2009 13:54:25 +0000 http://www.adamsinfo.com/?p=803#comment-918 I'd just do it with a regular expression... wxs@rst wxs % cat foo a a111111111112222 1a11111111112222 1111111111112222 222222222223333 33333333333334444 wxs@rst wxs % sed -e 's/^[0-9]\{12\}\([0-9]\{4\}\)$/XXXXXXXXXXXX\1/' < foo a a111111111112222 1a11111111112222 XXXXXXXXXXXX2222 222222222223333 33333333333334444 wxs@rst wxs % I’d just do it with a regular expression…

wxs@rst wxs % cat foo
a
a111111111112222
1a11111111112222
1111111111112222
222222222223333
33333333333334444
wxs@rst wxs % sed -e ’s/^[0-9]\{12\}\([0-9]\{4\}\)$/XXXXXXXXXXXX\1/’ < foo
a
a111111111112222
1a11111111112222
XXXXXXXXXXXX2222
222222222223333
33333333333334444
wxs@rst wxs %

]]>