shell腳本中用到的條件和循環語句

本博文介紹一下shell腳本中常用的條件和循環語句：

條件語句：

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循環語句：

                 

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示例：

1. if語句：

                        eg1.

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                        eg2.

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    2.case語句：

          簡單的case語句：

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            配合循環的case語句：

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    3.for語句：

                簡單的for語句：eg1.

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                        eg2.

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                和case搭配的for語句：eg3.

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    4.while語句：

                            eg1.

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                        eg2.

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     5.util語句：

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     6.select語句：

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