Text processing the-sed advanced usage of the Three Musketeers

Advanced Editing Commands:

     h: Overwrite the contents of the pattern space in the hold space      h: Append the contents of the pattern space to the hold space       h H  Copy/append pattern space to hold space          g: Overlay content in the hold space into the pattern space      g: Append content in the hold space to the pattern space      g g  copy/append hold space to  pattern space.         x: Swap the content in the pattern space with the content in the hold space       x  Exchange the contents of the hold and  Pattern spaces.         n: Overwrite the next line of the row that matches the match to the pattern space       n: Append read to the next line of the row to pattern space      n N Read/append the  next line of input into the pattern space.          d: Delete rows in the pattern space &Nbsp;       d  delete pattern space.  start  next cycle.         d: Delete all rows in multi-line mode space

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Example

# sed-n ' n;p '/etc/fstab show even line # sed ' 1! G;h;$!d ' file in reverse order displays the contents # sed ' $!d ' file take out the last line # sed ' $! n;$! D ' file takes two lines after extracting the files; # sed '/^$/d; G ' file deletes all blank lines, and then adds a blank line for all non-blank lines # sed ' n;d ' file shows odd lines # sed ' G ' file adds a blank line behind each line

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Text processing the-sed advanced usage of the Three Musketeers