Merge pull request raspberrypi#766 from timo-keller/patch-1

Fixed typo in wireless-cli.md

Author: bennuttall

configuration/wireless/wireless-cli.md

@@ -37,7 +37,7 @@ Note that the plain text version of the code is present, but commented out. You
 
 The `wpa_passphrase` tool requires a password with between 8 and 63 characters. For more complex passphrases you can extract the content of a text file and use it as input for `wpa_passphrase`, if the password is stored as plain text inside a file somewhere, by calling `wpa_passphrase "testing" < file_where_password_is_stored`. For extra security, you should delete the `file_where_password_is_stored` afterwards, so there is no plain text copy of the original password on the system.
 
-If you are using the `wpa_passphrase` encrypted PSK you can either copy and paste the encrypted PSK into the `wpa_supplicant.confg` file,  or redirect the tools output to your configuration file by calling `wpa_passphrase "testing" "testingPassword" >> /etc/wpa_supplicant/wpa_supplicant.conf`. Note that this requires you to change to `root` (by executing `sudo su`), or you can use `wpa_passphrase "testing" "testingPassword" | sudo tee -a /etc/wpa_supplicant/wpa_supplicant.conf > /dev/null`, which will append the passphrase without having to change to `root`. Both methods provide the necessary administrative privileges to change the file. Lastly, make sure you use `>>`, or use `-a` with `tee`, (both can be used to append text to an existing file) since `>`, or omitting `-a` when using `tee`, will erase all contents and **then** append the output to the specified file. Note that the redirection to `/dev/null` at the end of the second form simply prevents `tee` from **also** outputting to the screen (standard output).
+If you are using the `wpa_passphrase` encrypted PSK you can either copy and paste the encrypted PSK into the `wpa_supplicant.conf` file,  or redirect the tools output to your configuration file by calling `wpa_passphrase "testing" "testingPassword" >> /etc/wpa_supplicant/wpa_supplicant.conf`. Note that this requires you to change to `root` (by executing `sudo su`), or you can use `wpa_passphrase "testing" "testingPassword" | sudo tee -a /etc/wpa_supplicant/wpa_supplicant.conf > /dev/null`, which will append the passphrase without having to change to `root`. Both methods provide the necessary administrative privileges to change the file. Lastly, make sure you use `>>`, or use `-a` with `tee`, (both can be used to append text to an existing file) since `>`, or omitting `-a` when using `tee`, will erase all contents and **then** append the output to the specified file. Note that the redirection to `/dev/null` at the end of the second form simply prevents `tee` from **also** outputting to the screen (standard output).
 
 Now save the file by pressing `Ctrl+X`, then `Y`, then finally press `Enter`.