摘要：
这才是真的大师之作 原文地址http://sed.sourceforge.net/sed1line.txtFILE SPACING:# double space a filesed G# double space a file which already has blank lines in it. Output file# should contain no more than one blank line between lines of text.sed '/^$/d;G'# triple space a filesed 'G;G'# undo doubl 阅读全文