Sed One-Liners Explained, Part I: File Spacing, Numbering and Text Conversion and Substitution

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Paolo Bonzini Permalink
October 08, 2008, 11:05

Regarding the comment that the shortest one-liner which does a null-filter is

sed ''

actually if you count the number of characters to type, the shortest is

sed b

Also, regarding oneliner 37, it could be a little easier to understand if the //D command is changed to /^[^\n]/D. Alternatively you can use

/\n/!G;s/\(.\)\(.*\n\)/&\2\1/;s/^\n//p;D

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