epcim · February 1, 2024 08:40 · Jul 27, 2017 · Jul 22, 2016 · Jul 22, 2016
diff --git a/sed-mutli-line-replacement-between-two.md b/sed-mutli-line-replacement-between-two.md
@@ -0,0 +1,82 @@
+# doc
+http://fahdshariff.blogspot.cz/2012/12/sed-mutli-line-replacement-between-two.html
+
+    Sed: Mutli-Line Replacement Between Two Patterns
+    This post has some useful sed commands which can be used to perform replacements and deletes between two patterns across multiple lines. For example, consider the following file:
+    $ cat file
+    line 1
+    line 2
+    foo
+    line 3
+    line 4
+    line 5
+    bar
+    line 6
+    line 7
+    1) Replace text on each line between two patterns (inclusive):
+    To perform a replacement on each line between foo and bar, including the lines containing foo and bar, use the following:
+    $ sed '/foo/,/bar/{s/./x/g}' file
+    line 1
+    line 2
+    xxx
+    xxxxxx
+    xxxxxx
+    xxxxxx
+    xxx
+    line 6
+    line 7
+    2) Replace text on each line between two patterns (exclusive):
+    To perform a replacement on each line between foo and bar, excluding the lines containing foo and bar, use the following:
+    $ sed '/foo/,/bar/{/foo/n;/bar/!{s/./x/g}}' file
+    line 1
+    line 2
+    foo
+    xxxxxx
+    xxxxxx
+    xxxxxx
+    bar
+    line 6
+    line 7
+    3) Delete lines between two patterns (inclusive):
+    To delete all lines between foo and bar, including the lines containing foo and bar, use the same replacement sed command as shown above, but simply change the replacement expression to a delete.
+    $ sed '/foo/,/bar/d' file
+    line 1
+    line 2
+    line 6
+    line 7
+    4) Delete lines between two patterns (exclusive):
+    To delete all lines between foo and bar, excluding the lines containing foo and bar, use the same replacement sed command as shown above, but simply change the replacement expression to a delete.
+    $ sed '/foo/,/bar/ {/foo/n;/bar/!d}' file
+    line 1
+    line 2
+    foo
+    bar
+    line 6
+    line 7
+    5) Replace all lines between two patterns (inclusive):
+    To perform a replacement on a block of lines between foo and bar, including the lines containing foo and bar, use:
+    $ sed -n '/foo/{:a;N;/bar/!ba;N;s/.*\n/REPLACEMENT\n/};p' file
+    line 1
+    line 2
+    REPLACEMENT
+    line 6
+    line 7
+    How it works:
+    /foo/{                   # when "foo" is found
+      :a                     # create a label "a"
+        N                    # store the next line
+      /bar/!ba               # goto "a" and keep looping and storing lines until "bar" is found
+      N                      # store the line containing "bar"
+      s/.*\n/REPLACEMENT\n/  # delete the lines
+    }
+    p                        # print
+    6) Replace all lines between two patterns (exclusive):
+    To perform a replacement on a block of lines between foo and bar, excluding the lines containing foo and bar, use:
+    $ sed -n '/foo/{p;:a;N;/bar/!ba;s/.*\n/REPLACEMENT\n/};p' file
+    line 1
+    line 2
+    foo
+    REPLACEMENT
+    bar
+    line 6
+    line 7
diff --git a/sed_regex_keywords.md b/sed_regex_keywords.md
@@ -1,5 +1,5 @@
 # Character Class	Description
-
+```
   [[:alnum:]]	Alphanumeric [a-z A-Z 0-9]
   [[:alpha:]]	Alphabetic [a-z A-Z]
   [[:blank:]]	Blank characters (spaces or tabs)
@@ -11,4 +11,5 @@
   [[:punct:]]	Punctuation characters
   [[:space:]]	Whitespace
   [[:upper:]]	Uppercase letters [A-Z]
-  [[:xdigit:]]	Hex digits [0-9 a-f A-F]
+  [[:xdigit:]]	Hex digits [0-9 a-f A-F]
+```
diff --git a/sed_regex_keywords.md b/sed_regex_keywords.md
@@ -0,0 +1,14 @@
+# Character Class	Description
+
+  [[:alnum:]]	Alphanumeric [a-z A-Z 0-9]
+  [[:alpha:]]	Alphabetic [a-z A-Z]
+  [[:blank:]]	Blank characters (spaces or tabs)
+  [[:cntrl:]]	Control characters
+  [[:digit:]]	Numbers [0-9]
+  [[:graph:]]	Any visible characters (excludes whitespace)
+  [[:lower:]]	Lowercase letters [a-z]
+  [[:print:]]	Printable characters (noncontrol characters)
+  [[:punct:]]	Punctuation characters
+  [[:space:]]	Whitespace
+  [[:upper:]]	Uppercase letters [A-Z]
+  [[:xdigit:]]	Hex digits [0-9 a-f A-F]