vi E45: 'readonly' option is set (add ! to override)

当在使用vi编辑器时，如果出现E45: 'readonly' option is set (add ! to override)的错误提示，意味着当前文件被设置为只读模式，无法进行编辑操作。为了覆盖只读模式进行编辑，需要在命令行模式下输入":set noreadonly"命令来取消只读模式，然后可以进行编辑操作。如果仍然希望在只读模式下编辑文件，可以在输入":wq"命令保存并退出编辑器，或者输入":q!"命令强制退出编辑器。这样就可以解决vi编辑器出现E45错误的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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