shell字符串处理

1.待实践

http://www.blogjava.net/Man/archive/2012/02/07/369504.html

http://blog.csdn.net/dao123mao/article/details/5339201

?

2.cut

echo "1/2/3/4" | cut -d"/" -f1 ? =》1

echo "1/2/3/4" | cut -d"/" -f1,3 ? =》1/3

echo "1/2/3/4/5/6/7" | cut -d"/" -f1-2,5-7 ? =》1/2/ ?+ ?5/6/7

?

?

3.

cut -c[rang1],[rang2]

cut -b[rang]

?

rang:

5 ? :第5个

5- ?:第5个到最后一个

-5 ?:1-5

5-9 :5-9

?