tr -s '\n' <filepath
或者cat -s filepath #將多行空行合併成一行
或者perl -00pe0 foo >bar
http://www.mawode.com/blog/blog/2011/08/15/perl-one-liner-to-squeeze-blank-lines/
tr -s '\n' <filepath
或者cat -s filepath #將多行空行合併成一行
或者perl -00pe0 foo >bar
http://www.mawode.com/blog/blog/2011/08/15/perl-one-liner-to-squeeze-blank-lines/