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Shell: tls, ntp and netstat (#90)
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The rest of the issue's list. tls makes a handshake that checks nothing,
then says the certificate in words: who it is for, who signed it, until
when, and whether this device's roots and the name asked for accept it,
with the reason when they don't. ntp compares a time server's clock with
the device's. netstat lists what listens and what is connected.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
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twisla
2026-10-08 02:54:59 +02:00
co-authored by Claude Opus 5.5
parent 9b6457d1ec
commit 9808013fc0
12 changed files with 395 additions and 16 deletions
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@@ -45,7 +45,7 @@ The capital is the difference: every command is in small letters, every App star
## The network
For the day the network doesn't do what it should. Each of the first four takes a moment and prints as it goes; one runs at a time, and `cancel` stops it.
For the day the network doesn't do what it should. Each of the first six takes a moment and prints as it goes; one runs at a time, and `cancel` stops it.
| Command | Tells you |
|---|---|
@@ -53,8 +53,11 @@ For the day the network doesn't do what it should. Each of the first four takes
| `nslookup roro9stack.net` | A name's addresses, which DNS server answered and in how long. Another server may follow: `nslookup roro9stack.net 9.9.9.9` |
| `port git.twis.la 443` | Whether a TCP port is **open**, **refused** (the host is there, nothing listens) or silent (down, or filtered) |
| `traceroute 9.9.9.9` | The routers on the way, one a line |
| `tls git.twis.la` | A secure connection's certificate: who it is for, who signed it, until when, and **whether this device trusts it**. A port may follow (443 if not) |
| `ntp` | A time server's clock against this device's, and how far the server is. Another server may follow |
| `ifconfig` | The interfaces (Wi-Fi, and the [VPN](/guide/vpn/) when it is up), their addresses, **which one is the default route**, and the DNS servers |
| `arp` | The neighbours heard on the Wi-Fi: is the gateway there at all |
| `netstat` | What the device **listens** on (updates, the Debug Console, sharing) and what is connected to it now |
A host can be a name or an address. [When the network doesn't work](/howto/network-check/) puts them in order.