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环境: aix 5.2 + bash 3.00.16
今天重新测试的结果是:
- huang@F85_cz /home/huang/test>unset var1
- huang@F85_cz /home/huang/test>unset var2
- huang@F85_cz /home/huang/test>echo $var1
- huang@F85_cz /home/huang/test>echo $var2
- huang@F85_cz /home/huang/test>ls
- 2008020801.dmp 2008020802.dmp 2008020803.dmp
- huang@F85_cz /home/huang/test>var1=`date +%Y%m%d`
- huang@F85_cz /home/huang/test>echo $var1
- 20080208
- huang@F85_cz /home/huang/test>var2=${var1}*.dmp
- huang@F85_cz /home/huang/test>echo $var2
- 2008020801.dmp 2008020802.dmp 2008020803.dmp
- huang@F85_cz /home/huang/test>unset var2
- huang@F85_cz /home/huang/test>var2=${var1}"*.dmp"
- huang@F85_cz /home/huang/test>echo $var2
- 2008020801.dmp 2008020802.dmp 2008020803.dmp
- huang@F85_cz /home/huang/test>var2=${var1}'*.dmp'
- huang@F85_cz /home/huang/test>echo $var2
- 2008020801.dmp 2008020802.dmp 2008020803.dmp
- huang@F85_cz /home/huang/test>
复制代码
不管加不加 " "或者 '',都会自动扩展 |
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