注：Today环境变量不同使用方法，临时设置reboot之后失效请注意
export Today=$(date +%Y-%m-%d)
echo "$Today"
2013-11-26
echo "$Today"123
2013-11-26123
echo "$Today-123"
2013-11-26-123
echo "[$Today]sfcp_2_3_idx.dmp"
[2013-11-26]sfcp_2_3_idx.dmp
echo [$Today]sfcp_2_3_idx.dmp
[2013-11-26]sfcp_2_3_idx.dmp
touch "[$Today]sfcp_2_3_idx.dmp"
[2013-11-26]sfcp_2_3_idx.dmp
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