minor updates

linux/system/rrsync.md

@@ -2,19 +2,19 @@
 
 ## setup
 
-copy rrsync script to `/usr/local/bin`:
+copy the rrsync script to `/usr/local/bin`:
 ```
 sudo cp /usr/share/rsync/scripts/rrsync /usr/local/bin/
 sudo chmod +x /usr/local/bin/rrysnc
 ```
 
-There is an option in the SSHD configuration file for allowing root logins only with the command parameter set. This allows a client to login to the server as root if they have a key in root's authorized_keys, but only if that key has the "`command`" parameter set.
+There is an option in the SSHD configuration file for allowing root logins only with the command parameter set. This allows a client to login to the server as root if they have a key in root's `authorized_keys`, but only if that key has the '`command`' directive set.
 
-To activate this option, set the following option in `/etc/ssh/sshd_config`:
+To activate this option, add the following option to `/etc/ssh/sshd_config`:
 ```
 PermitRootLogin forced-commands-only
 ```
-And don't forget to reload SSH daemon:
+And don't forget to reload the SSH daemon:
 ```
 sudo systemctl reload sshd
 ```
@@ -27,14 +27,14 @@ rrsync [-ro|-wo] SUBDIR
 ```
 rrsync can be restricted to read-only mode by the `-ro` flag, or write-only mode by the `-wo` flag. The subdir argument sets the directory that rrsync is restricted to. Rrsync will not be allowed to read or write from anywhere other than that directory.
 
-To add a command directive to an authorized key, simply include the directive '`command="my_command"`' in front of the rest of the key on that line in the authorized_keys file. For example, so add a key that is restricted to only being able to run rrsync in read-only mode on the directory `/foo`, you would add the following command directive in front of the key:
+To add a command directive to an authorized key, simply include the directive '`command="my_command"`' in front of the rest of the key on that line in the `authorized_keys` file. For example, to add a key that is restricted to only being able to run rrsync in read-only mode on the directory `/foo`, you would add the following command directive in front of the key:
 ```
 command="rrsync -ro /foo" <key>
 ```
 
 When a remote client attempts to use this key to run a command on the host, the `command` directive causes SSHD to ignore any commands sent by the client, and execute the actions specified in the `command` directive instead. Rrsync will then be able to parse your attempted rsync command, and execute it if it determines that it is an allowed action.
 
-Note that any remote directories in the client's rsync command must be specified *relative to the subdirectory* specified in the `command` directive. For example, if a client wants to pull the contents of the directory `/foo/bar` on the server to the same directory on the client using the key from the example above, they would run the command:
+Note that any remote directories in the client's rsync command must be specified *relative to the subdirectory* given in the `command` directive. For example, if a client wanted to pull the contents of the directory `/foo/bar` on the server to the same directory on the client using the key from the example above, they would run the command:
 ```
 rsync -av server:bar/ /foo/bar/
 ```