提取文本中的邮箱地址或者URL
[root@cdc1 ~]# cat email.txt aase aser ssds ,sere,mail:abcd@163.comasler sld kelr ewr e lslre er s slleelee sss esr and email address :"http://space.itpub.net/?26839123",kk@126.comseesd sd...
去除每行行首空格
[root@cdc1 ~]# cat mm.txt 1 mac 200010 admin 4000 4 ss 800 9 gg 100000 &nb...