Web19 Jul 2012 · Shell Scripting Problem - Invalid Back Reference Here is the question... Create a new script, sub2, taking three parameters... 1.) the string to be replaced 2.) the string with which to replace it 3.) the name of the file in which to make the substitution ...that treats the string to be replaced as plain text instead of as a regular expression.

GNU sed, a stream editor

Web22 Oct 2024 · Currently, my .sed script contains this: :a s/^ (. {4}x {0,}) [^x ]/\1x/;ta. I keep getting this error. sed: file script.sed line 2: invalid reference \1 on `s' command's RHS. … WebBack-references and subexpressions are used in two cases: in the regular expression search pattern, and in the replacement part of the s command (see Regular Expression … fast boot cable

sed Tutorial => Backreference

Web26 Feb 2015 · Shell Scripting Problem - Invalid Back Reference Here is the question... Create a new script, sub2, taking three parameters... 1.) the string to be replaced 2.) the string with which to replace it 3.) the name of the file in which to make the substitution ...that treats the string to be replaced as plain text instead of as a regular... 7. Web24 Apr 2013 · 1 Answer Sorted by: 2 Unterminated `s' command means you are missing a delimiter. You need 3 and have just 2 in your command. sed -i 's/port=\"8080\"/port="\8000/"' /opt/apache-tomcat-7.0.37/conf/server.xml I flipped the last \ to / and it works: more test port="8080" sed -i 's/port="8080"/port="8000"/' test more test port="8000" Share Websed Substitution Backreference Fastest Entity Framework Extensions Bulk Insert Bulk Delete Bulk Update Bulk Merge Example # Using escaped brackets, you can define a capturing group in a pattern that can be backreferenced in the substitution string with \1: $ echo Hello world! sed 's/\ (Hello\) world!/\1 sed/' Hello sed With multiple groups: f reg. section 20.2010-2 a 7 ii