linux vi 报错 E37: No write since last change (add ! to override)
2016-10-04 14:54
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用 vi 命令编辑文本文件，没有文件写入权限的时候会报这个错。:q :wq 怎么都不能退出。
这时只需 ctrl+z 即可，或者在退出命令后加 ! 忽略提示 :q!
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