Use the fignore shell variable to avoid accidental deletion
使用 fignore shell 变量避免意外删除
To enable this feature, you need to set the autolist shell variable.
为了启用这个特性，需要设置shell变量autolist。
To prevent this from happening, always keep the noclobber shell variable turned on.
为了防止发生这种情况，应该一直打开shell变量noclobber。
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