Differences

This shows you the differences between two versions of the page.

--- bash:files:find_replace_a_string_within_a_file [2021/02/10 16:06] – peter
+++ bash:files:find_replace_a_string_within_a_file [2021/02/10 16:14] (current) – [Put the output of file f1 into the pattern space of file f2] peter
@@ Line 1: / Line 1: @@
 ====== BASH - Files - Find & Replace a String within a File ======
+See:  [[BASH:Strings:Find & Replace|Find & Replace]].
+----
 ===== Changing contents within a file =====
@@ Line 22: / Line 26: @@
 <code bash>
 echo "${contents/$old/$new}" > infile.tmp && mv infile.tmp infile.txt
+</code>
+----
+===== Put the output of file1 into the pattern space of file2 =====
+<file text file1>
+aaaaaaaaaaaaaaaaaa //these line go in file2
+aaaaaaaaaaaaaaaaaa
+aaaaaaaaaaaaaaaaaa
+</file>
+<file text file2>
+Pattern_start
+__________ //these are the line to be replaced
+__________
+Pattern_end
+</file>
+<code bash>
+sed -n '/Pattern_start/,/Pattern_end/{/^Pattern/! d;}" file2 | sed "/Pattern_start/r file1"
+</code>
+<WRAP info>
+**NOTE:**
+  * **<nowiki>/^Pattern/</nowiki>**:  Used this to avoid deleting the **Pattern_start** and **Pattern_end** lines.
+</WRAP>
+----
+If the lines between Pattern_start and Pattern_end contain only hyphens then you can use this:
+<code bash>
+sed -n '/Pattern_start/,/Pattern_end/{/^---*/d;}" file2 | sed "/Pattern_start/r file1"
 </code>