Saving file as root using sudo

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Saving files as root using sudo

Many times while working as normal user, one ends up editing a system file such as '/etc/hosts' as normal user. On saving the changes error 'readonly' file gets generated due to insufficient permissions. In such cases to save file as root without loosing the changes one can use 'sudo' command, provided the current user has sudo access. (Sudo access configuration can be learned from Allowing user to run all commands as root without specifying password). To save file as root with sudo one can use:

:w !sudo tee %

Steps learned from http://www.cyberciti.biz/faq/vim-vi-text-editor-save-file-without-root-permission/