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I have this sed command for removing the spaces after commas.
sed -e 's/,\s\+/,/g' example.txt
How can i change it that, it will make the modification between only specific line numbers.
(e.g. between second and third lines).
620
Just add the line number before: sed '<line number>s/<search pattern>/<replacement string>/ . Note I use . bak after the -i flag. This will perform the change in file itself but also will create a file.
By using N and D commands, sed can apply regular expressions on multiple lines (that is, multiple lines are stored in the pattern space, and the regular expression works on it): $ cat two-cities-dup2.
To do this, press Esc , type the line number, and then press Shift-g . If you press Esc and then Shift-g without specifying a line number, it will take you to the last line in the file.
Use:
sed '2,3s/,\s\+/,/g' example.txt
Since OSX (BSD sed) has some syntax differences to linux (GNU) sed, thought I'd add the following from some hard-won notes of mine:
OSX (BSD) SED find/replace within (address) block (start and end point patterns(/../) or line #s) in same file (via & via & via & section 4.20 here):
Syntax:
$ sed '/start_pattern/,/end_pattern/ [operations]' [target filename]
Standard find/replace examples:
$ sed -i '' '2,3 s/,\s\+/,/g' example.txt
$ sed -i '' '/DOCTYPE/,/body/ s/,\s\+/,/g' example.txt
Find/replace example with complex operator and grouping (cannot operate without grouping syntax due to stream use of standard input). All statements in grouping must be on separate lines, or separated w/ semi-colons:
Complex Operator Example (will delete entire line containing a match):
$ sed -i '' '2,3 {/pattern/d;}' example.txt
Multi-file find + sed:
$ find ./ -type f -name '*.html' | xargs sed -i '' '/<head>/,/<\/head>/ {/pattern/d; /pattern2/d;}'
Hope this helps someone!
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