asterisk: add page

[girlpunk]

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

One of the pages requested in #3689. I've focused on commands used for managing a running server with SIP clients on chan_sip as these are used most frequently.

[CLAassistant]

All committers have signed the CLA.

[tldr-bot]

The build for this PR failed with the following error(s):

pages/linux/asterisk.md:15: TLDR005 Example descriptions should end in a colon with no trailing characters
pages/linux/asterisk.md:19: TLDR005 Example descriptions should end in a colon with no trailing characters
pages/linux/asterisk.md:23: TLDR005 Example descriptions should end in a colon with no trailing characters
pages/linux/asterisk.md:27: TLDR005 Example descriptions should end in a colon with no trailing characters

Please fix the error(s) and push again.

[sbrl]

Are there any long forms of these arguments? We generally prefer long forms on tldr pages to aid clarity.

[girlpunk]

Unfortunately not. I can see some other tldr pages uses syntax such as [r]econnect, would this work for an extra example such as this?

- [r]econnect to a running server and e[x]ecute a command:

`asterisk -r -x "{{command}"`

[sbrl]

No problem - it doesn't hurt to check. Yeah, that extra example would be great if possible!

[girlpunk]

How's that looking now?

[sbrl]

Much better, thanks :D

I've just left a comment about a potential typo.

[sbrl]

Thanks, @cyberjacob ❤️

[sbrl]

Much better, thanks :D

I've just left a comment about a potential typo.

[sbrl]

Looks like this one slipped through the net. /cc @owenvoke / @navarroaxel / @agnivade for a 2nd opinion?

[navarroaxel]

@cyberjacob just 2 comments