Tip 45: Save a File as the Super User

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:w !sudo tee % > /dev/null

• :write !{cmd}: send the contents of the buffer as standard input to the specified {cmd}

References

# If you open the file in vim,
# then you can \"ayy@a the next line to execute the vim command: 
:h :write_c

• %: expands to represent the path of the current buffer

References

# If you open the file in vim,
# then you can \"ayy@a the next line to execute the vim command: 
:h :_%