问题描述：E45: 'readonly' option is set (add ! to override)
问题分析：该错误为当前用户没有权限对文件作修改
问题解决：
输入 :w !sudo tee %
- :w – write
- !sudo – call shell sudo command
- tee – the output of write (:w) command is redirected using tee
- % – current file name
Ubuntu问题：E45: 'readonly' option is set (add ! to override)错误解决
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