http://www.runoob.com/w3cnote/shell-scripting.html
filename = "/home/........."错误！不能有空格
--->filename=" "
command >out.txt 2>err.txt：
命令中正确的输出到out.txt，错误信息到err.txt
cat data.txt | cut -d"/" -f2 | sort | uniq -c处理一下文件，取出123.。。。。并且排序、统计次数
[root@localhost ~]# cat data.txt
2015.04.23 21:38:56/123/Jim/Script hanging.
2015.04.23 21:43:50/321/Susane/Mouse was stolen
2015.04.23 21:47:55/123/Jim/Script still not works.
2015.04.23 21:48:16/777/Daniel/I broke my monitor
2015.04.23 22:02:14/123/Jimmy/New script also not working!!!