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Some svn tricks

1.Sovle checksum mismatch when update  
When performing "svn up test.h", you may get error:  
svn: Checksum mismatch for …  
To solve the issue, you may want to backup files mentioned below, and perform following actions:  
1) vi .svn/entries, find and delete content like 
^L
test.c
file
712

2010-10-24T09:39:39.000000Z
d41d8cd98f00b204e9800998ecf8427e
2008-10-21T19:51:09.435185Z
3

foo
0
^L

2) delete related files in .svn/text-base/(e.g., test.c.svn-base)
3) delete related files in .svn/tmp/text-base/  
4) delete test.c
5) svn up test.c
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