Shulou(Shulou.com)06/02 Report--

There are many methods on the Internet, although they are right, they do not turn out to be right. The right way is provided here.

Remove the space at the beginning

The writing of $text= "123456" # ensures that the correct results are obtained. Text= `echo $text | sed-e's / ^ [\ t] * / / g'` # these methods have not been tested. Refer to the above. # remove the spaces in the tail sed's / [\ t] * $/ / glines # delete the spaces before and after deleting the spaces, and do not delete the spaces in the middle, sed-e's / ^ [\ t] * / / g'-e's / [\ t] * $/ / glines # Delete all spaces in the string sed's / [: space:] / / g'

Of course, there is a simple way:

# replace only one text=$ {text// -} # replace all text=$ {text// / -}

Summary

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