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#### 2.18.1 Scanning New Messages

`g`

  Check the server(s) for new articles. If the numerical prefix is used, this command will check only groups of level arg and lower (`gnus-group-get-new-news`). If given a non-numerical prefix, this command will force a total re-reading of the active file(s) from the back end(s).

`M-g`

  Check whether new articles have arrived in the current group (`gnus-group-get-new-news-this-group`). `gnus-goto-next-group-when-activating` says whether this command is to move point to the next group or not. It is `t` by default.

`C-c M-g`

  Activate absolutely all groups (`gnus-activate-all-groups`).

`R`

  Restart Gnus (`gnus-group-restart`). This saves the `.newsrc` file(s), closes the connection to all servers, clears up all run-time Gnus variables, and then starts Gnus all over again.

`gnus-get-new-news-hook` is run just before checking for new news.

`gnus-after-getting-new-news-hook` is run after checking for new news.