A user wants to understand how to manage their Libreswan IPsec setup. Explain how to check the Libreswan configuration, verify the status of all active IPsec connections, and reload pre-shared keys after modification. For each, provide the specific `ipsec` command used and a brief description of its function.
Navigate to the 'Documentation' section. From the 'Documentation' section, navigate to 'All Manual pages'. Locate and navigate to the `ipsec-up(8)` manual page. From the 'SEE ALSO' section of `ipsec-up(8)`, identify the command for checking Libreswan configuration and its purpose. From the 'SEE ALSO' section of `ipsec-up(8)`, identify the command for checking the status of all IPsec connections and its purpose. From the 'SEE ALSO' section of `ipsec-up(8)`, identify the command for reloading pre-shared keys and its purpose. Synthesize the identified commands and their functions into a concise answer.
Identify `ipsec-checkconfig(8)` as the command for checking Libreswan configuration and state its purpose. Identify `ipsec-status(8)` (or `ipsec-briefstatus(8)`) as a command for checking the status of all IPsec connections and state its purpose. Identify `ipsec-rereadsecrets(8)` as the command for reloading pre-shared keys and state its purpose. Provide the exact command names and a brief, accurate description of their function for all three scenarios.