### Start Shadowsocks-libev Server

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

Command to initiate the Shadowsocks-libev server service using its init script, bringing the proxy online.

```bash
sudo /etc/init.d/shadowsocks-libev start
```

--------------------------------

### Start OpenVPN Client with a Configuration File

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

This command initiates the OpenVPN client on Linux and macOS systems, instructing it to use a specified configuration file. Replace '/path/to/config.ovpn' with the actual path to your OpenVPN configuration file. This command requires superuser privileges.

```bash
sudo openvpn --config /path/to/config.ovpn
```

--------------------------------

### Install StrongSwan IPsec VPN Software on Linux

Source: https://www.e2encrypted.com/howtos/set-up-ipsec-vpn-step-by-step-guide

This command sequence updates the package list and then installs the StrongSwan IPsec VPN software along with the EAP-MSCHAPv2 plugin, which is required for certain authentication methods.

```Shell
sudo apt-get update
sudo apt-get install strongswan strongswan-plugin-eap-mschapv2
```

--------------------------------

### Start StrongSwan IPsec VPN Service

Source: https://www.e2encrypted.com/howtos/set-up-ipsec-vpn-step-by-step-guide

This command initiates the StrongSwan IPsec VPN service, making the configured VPN connections active and ready to accept client connections.

```Shell
sudo ipsec start
```

--------------------------------

### Shadowsocks-libev Server Configuration Example

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

Provides a sample JSON configuration file for the Shadowsocks-libev server, detailing parameters such as server address, port, local port, password, timeout, encryption method, workers, and plugin options.

```json
{
    "server":"0.0.0.0",
    "server_port":9521,
    "local_port":1080,
    "password":"dUS9Sw5QMiMQ<Change it to your password>",
    "timeout":300,
    "method":"chacha20-ietf-poly1305",
    "workers":8,
    "plugin":"obfs-server",
    "plugin_opts": "obfs=tls;obfs-host=www.yahoo.com",
    "fast_open":true,
    "reuse_port":true
}
```

--------------------------------

### Execute UUP Dump macOS Download Script

Source: https://www.e2encrypted.com/posts/uup-dump-on-macos-guide-and-troubleshooting

This snippet shows the command to run the `uup_download_macos.sh` script, which automates the process of downloading Windows installation files and converting them into an ISO image on macOS. The output demonstrates the various stages, including converter downloads, file transfers, and ISO creation.

```sh
sh ./uup_download_macos.sh
Downloading converters...
[NOTICE] CUID#7 - Redirecting to https://raw.githubusercontent.com/uup-dump/converter/.../convert.sh
...
Download complete: files/convert.sh
...
Download complete: files/convert_ve_plugin
...
Download complete: /Users/.../aria2_script.9201.txt
...
Download complete: UUPs/Microsoft-Windows-Client-Desktop-Required-Package.ESD
...
CAB -> ESD: Microsoft-Windows-LanguageFeatures-Speech-en-us-Package-arm64
...
Creating ISO image...
...
Total translation table size: 2048
Total rockridge attributes bytes: 0
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 0
2194437 extents written (4286 MB)
Done.
```

--------------------------------

### Install Certbot on Debian using Snap

Source: https://www.e2encrypted.com/howtos/how-to-get-wildcard-tls-certificate-from-letsencrypt

Installs the Certbot client on a Debian system using Snap, a universal packaging system, and creates a symbolic link for easy access. This setup is necessary before proceeding with certificate generation.

```Shell
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot
```

--------------------------------

### Network Path Verification Tools

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

Command-line utilities for tracing network paths and performing continuous diagnostics to ensure proper VPN connectivity and data routing.

```Shell
traceroute
```

```Shell
mtr
```

--------------------------------

### Nostr NIP-73 Examples: Referencing Podcasts by GUID

Source: https://www.e2encrypted.com/nostr/nips/73

These examples illustrate how to reference different types of podcast identifiers (RSS Feed GUID, RSS Item GUID, RSS Publisher GUID) using 'i' tags in Nostr events. Each 'i' tag includes a specific 'podcast:' prefix followed by the respective GUID, enabling precise linking to podcast content.

```JSON
["i", "podcast:guid:c90e609a-df1e-596a-bd5e-57bcc8aad6cc"]
```

```JSON
["i", "podcast:item:guid:d98d189b-dc7b-45b1-8720-d4b98690f31f"]
```

```JSON
["i", "podcast:publisher:guid:18bcbf10-6701-4ffb-b255-bc057390d738"]
```

--------------------------------

### Shadowsocks-libev Command Line Options Reference

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

Detailed documentation for the command-line arguments available for shadowsocks-libev components. Each option's purpose, accepted values, default settings, and specific applicability to different modes (e.g., server, local, manager) are described.

```APIDOC
shadowsocks-libev Command Line Options:
  -s <server_host>:
    Description: Set the server’s hostname or IP.
  -l <local_port>:
    Description: Set the local port number.
    Constraints: Not available in server nor manager mode.
  -k <password>, --password <password>:
    Description: Set the password. The server and the client should use the same password.
  --key <key_in_base64>:
    Description: Set the key directly. The key should be encoded with URL-safe Base64.
    Constraints: Not available in manager mode.
  -m <encrypt_method>:
    Description: Set the cipher.
    Accepted Values: aes-128-gcm, aes-192-gcm, aes-256-gcm, rc4-md5, aes-128-cfb, aes-192-cfb, aes-256-cfb, aes-128-ctr, aes-192-ctr, aes-256-ctr, bf-cfb, camellia-128-cfb, camellia-192-cfb, camellia-256-cfb, chacha20-ietf-poly1305, salsa20, chacha20, chacha20-ietf.
    Default: chacha20-ietf-poly1305.
    Note: If built with PolarSSL or custom OpenSSL libraries, some of these ciphers may not work.
  -a <user_name>:
    Description: Run as a specific user.
  -f <pid_file>:
    Description: Start shadowsocks as a daemon with specific pid file.
  -t <timeout>:
    Description: Set the socket timeout in seconds.
    Default: 60.
  -c <config_file>:
    Description: Use a configuration file.
  -n <number>:
    Description: Specify max number of open files.
    Constraints: Not available in manager mode. Only available on Linux.
  -i <interface>:
    Description: Send traffic through specific network interface.
    Example: If you configure shadowsocks-libev to listen on 0.0.0.0:8388 and bind to eth1, traffic will go out through eth1.
    Constraints: Not available in redir mode.
  -b <local_address>:
    Description: Specify local address to bind.
    Constraints: Not available in server nor manager mode.
  -u:
    Description: Enable UDP relay.
    Note: TPROXY is required in redir mode. May need root permission.
  -U:
    Description: Enable UDP relay and disable TCP relay.
    Constraints: Not available in local mode.
  -L <addr:port>:
    Description: Specify destination server address and port for local port forwarding.
    Constraints: Only available in tunnel mode.
  -d <addr>:
    Description: Setup name servers for internal DNS resolver (libc-ares).
    Default: Fetched from /etc/resolv.conf.
    Constraints: Only available in server and manager mode.
  --fast-open:
    Description: Enable TCP fast open.
    Constraints: Not available in redir nor tunnel mode, with Linux kernel > 3.7.0.
  --reuse-port:
    Description: Enable port reuse.
    Constraints: Only available with Linux kernel > 3.9.0.
  --no-delay:
    Description: Enable TCP_NODELAY.
  --acl <acl_config>:
    Description: Enable ACL (Access Control List) and specify config file.
    Constraints: Not available in redir nor tunnel mode.
  --manager-address <path_to_unix_domain>:
    Description: Specify UNIX domain socket address.
    Constraints: Only available in server and manager mode.
  --executable <path_to_server_executable>:
    Description: Specify the executable path of ss-server.
    Constraints: Only available in manager mode.
  -v:
    Description: Enable verbose mode.
  -h|--help:
    Description: Print help message.
```

--------------------------------

### Install Missing 'cabextract' Dependency

Source: https://www.e2encrypted.com/posts/uup-dump-on-macos-guide-and-troubleshooting

This command resolves the 'cabextract does not seem to be installed' error. It uses Homebrew to install the `cabextract` utility, which is essential for UUP Dump to process cabinet files.

```sh
brew install cabextract
```

--------------------------------

### Install acme.sh Client

Source: https://www.e2encrypted.com/howtos/how-to-get-tls-certificate-from-google

This command downloads and executes the acme.sh installation script, automatically installing the ACME client. It requires an email address for registration and notifications.

```Bash
curl https://get.acme.sh | sh -s email=<EMAIL>
```

--------------------------------

### Sample OpenVPN Client Configuration File (config.ovpn)

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

This is a sample OpenVPN client configuration file demonstrating common settings for connecting to a VPN server. It specifies the client mode, TUN device, UDP protocol, remote server address and port, and various authentication and optimization options. Users must replace 'VPN_SERVER_ADDRESS' and ensure correct paths for certificate and key files.

```OpenVPN Config
client
dev tun
proto udp
remote VPN_SERVER_ADDRESS 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client.crt
key client.key
tls-client
tls-auth ta.key 1
comp-lzo
verb 3
```

--------------------------------

### Install Missing 'wimlib' Dependency

Source: https://www.e2encrypted.com/posts/uup-dump-on-macos-guide-and-troubleshooting

This command addresses the 'wimlib-imagex does not seem to be installed' error. It uses Homebrew to install the `wimlib` library, which is crucial for handling Windows Imaging Format files during the UUP Dump process.

```sh
brew install wimlib
```

--------------------------------

### Install Certbot Cloudflare DNS Plugin

Source: https://www.e2encrypted.com/howtos/how-to-get-wildcard-tls-certificate-from-letsencrypt

This command installs the `certbot-dns-cloudflare` plugin using `pip3`. This plugin is essential for Certbot to automate the DNS-01 challenge with Cloudflare, as it is not installed by default.

```bash
pip3 install certbot-dns-cloudflare
```

--------------------------------

### Install OpenVPN Client on Debian-based Linux

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

This command installs the OpenVPN client package on Debian-based Linux distributions (e.g., Ubuntu, Mint) using the 'apt-get' package manager. It requires superuser privileges.

```bash
sudo apt-get install openvpn
```

--------------------------------

### Verify OpenVPN Service Status

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

Commands to check the running status of the OpenVPN service on both Linux and Windows operating systems.

```Shell (Linux)
systemctl status openvpn
```

```Shell (Windows)
sc query openvpn
```

--------------------------------

### Configure iptables for Shadowsocks-redir Traffic Redirection

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

This example provides a comprehensive set of iptables rules required to redirect TCP and UDP traffic through ss-redir. It includes creating custom chains, ignoring specific IP addresses (server, LANs, reserved networks), and applying REDIRECT for TCP and TPROXY for UDP, followed by the command to start ss-redir.

```bash
# Create new chain
iptables -t nat -N SHADOWSOCKS
iptables -t mangle -N SHADOWSOCKS

# Ignore your shadowsocks server's addresses
# It's very IMPORTANT, just be careful.
iptables -t nat -A SHADOWSOCKS -d 123.123.123.123 -j RETURN

# Ignore LANs and any other addresses you'd like to bypass the proxy
# See Wikipedia and RFC5735 for full list of reserved networks.
# See ashi009/bestroutetb for a highly optimized CHN route list.
iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN

# Anything else should be redirected to shadowsocks's local port
iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 12345

# Add any UDP rules
ip rule add fwmark 0x01/0x01 table 100
ip route add local 0.0.0.0/0 dev lo table 100
iptables -t mangle -A SHADOWSOCKS -p udp --dport 53 -j TPROXY --on-port 12345 --tproxy-mark 0x01/0x01

# Apply the rules
iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
iptables -t mangle -A PREROUTING -j SHADOWSOCKS

# Start the shadowsocks-redir
ss-redir -u -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid
```

--------------------------------

### Shadowsocks-libev Command Line Synopsis

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

Provides the general syntax for running shadowsocks-libev components (ss-local, ss-redir, ss-server, ss-tunnel, ss-manager) with common command-line options. This outlines the typical structure for invoking the various tools.

```Shell
NAME
       shadowsocks-libev - a lightweight and secure socks5 proxy

SYNOPSIS
       ss-local|ss-redir|ss-server|ss-tunnel|ss-manager [-s <server_host>] [-p <server_port>] [-l <local_port>] [-k <password>] [-m
       <encrypt_method>] [-f <pid_file>] [-t <timeout>] [-c <config_file>]
```

--------------------------------

### Install Certbot on macOS with Homebrew

Source: https://www.e2encrypted.com/howtos/how-to-get-wildcard-tls-certificate-from-letsencrypt

Installs the Certbot client on a macOS system using the Homebrew package manager. This command is a prerequisite for generating and managing Let's Encrypt certificates.

```Shell
brew install certbot
```

--------------------------------

### Compile and Install Simple-obfs from Source on Debian/Raspberry Pi

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

This snippet details the process of compiling and installing simple-obfs from its source code on Debian-based systems like Raspberry Pi. It includes installing necessary build dependencies, cloning the Git repository, updating submodules, and then configuring, compiling, and installing the software, showing the typical output of the build process.

```bash
$ sudo apt-get install --no-install-recommends build-essential autoconf libtool libssl-dev libpcre3-dev libev-dev asciidoc xmlto automake
$ git clone –-depth=1 --shallow-submodules https://github.com/shadowsocks/simple-obfs.git
$ cd simple-obfs
$ git submodule update --init --recursive
$ ./autogen.sh
$ ./configure && make
$ sudo make install
 /bin/mkdir -p '/usr/local/bin'
  /bin/bash ../libtool   --mode=install /usr/bin/install -c obfs-local obfs-server '/usr/local/bin'
 /bin/mkdir -p '/usr/local/share/doc/simple-obfs'
 /usr/bin/install -c -m 644 obfs-local.html obfs-server.html '/usr/local/share/doc/simple-obfs'
 /bin/mkdir -p '/usr/local/share/man/man1'
 /usr/bin/install -c -m 644 obfs-local.1 obfs-server.1 '/usr/local/share/man/man1'
```

--------------------------------

### Install 'cdrtools' to Fix 'genisoimage' Error

Source: https://www.e2encrypted.com/posts/uup-dump-on-macos-guide-and-troubleshooting

This command provides the solution for the 'No available formula with the name genisoimage' error, which often indicates that `genisoimage` or `mkisofs` is missing. Installing `cdrtools` via Homebrew provides the necessary utilities for ISO image creation.

```sh
brew install cdrtools
```

--------------------------------

### Connect OpenVPN Profile on Windows via Command Line

Source: https://www.e2encrypted.com/howtos/set-up-openvpn-comprehensive-guide-with-detailed-instructions

This command line snippet demonstrates how to programmatically connect to an OpenVPN profile on Windows. It uses the `openvpn-gui.exe` with the `--command connect` argument, specifying the path to the `.ovpn` configuration file. This is useful for scripting automated VPN connections.

```cmd
"C:\Program Files\OpenVPN\bin\openvpn-gui.exe" --command connect yourconfigfile.ovpn

```

--------------------------------

### Example PEM Encoded CA Certificate

Source: https://www.e2encrypted.com/certs/e72ef1dffcb20928cf5dd4d56737b151cb864f01

This is an example of a CA certificate encoded in PEM format, typically starting with '-----BEGIN CERTIFICATE-----' and ending with '-----END CERTIFICATE-----'. The content is base64 encoded.

```Text
-----BEGIN CERTIFICATE-----
MIIDczCCAlugAwIBAgILAK7PALrEzzL4Q7IwDQYJKoZIhvcNAQELBQAwVjELMAkG
A1UEBhMCVVMxEzARBgNVBAsTCmVtU2lnbiBQS0kxFDASBgNVBAoTC2VNdWRocmEg
SW5jMRwwGgYDVQQDExNlbVNpZ24gUm9vdCBDQSAtIEMxMB4XDTE4MDIxODE4MzAw
MFoXDTQzMDIxODE4MzAwMFowVjELMAkGA1UEBhMCVVMxEzARBgNVBAsTCmVtU2ln
biBQS0kxFDASBgNVBAoTC2VNdWRocmEgSW5jMRwwGgYDVQQDExNlbVNpZ24gUm9v
dCBDQSAtIEMxMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz+upufGZ
BczYKCFK83M0UYRWEPWgTywS4/oTmifQz/l5GnRfHXk5/Fv4cI7gklL35CX5VIPZ
HdPIWoU/Xse2B+4+wM6ar6xWQio5JXDWv7V7Nq2s9nPczdcdioOl+yuQFTdrHCZH
3DspVpNqs8FqOp099cGXOFgFixwR4+S0uF2FHYP+eF8LRWgYSKVGczQ7/g/IdrvH
GPMF0Ybzhe3nudkyrVWIzqa2kbBPrH4VI5b2P/AgNBbeCsbEBEV5f6f9vtKppa+c
xSMq9zwhbL2vj07FOrLzNBL834AaSaTUqZX3noleoomslMuoaJuvimUnzYnu3Yy1
aylwQ6BpC+S5DwIDAQABo0IwQDAdBgNVHQ4EFgQU/qHgcB4qAzlSWkK+XJGFehiq
TbUwDgYDUpDqw8NQBmIMMMAVSKeo
WXzhriKi4gp6D/piq1JM4fHfyr6DDUI=
-----END CERTIFICATE-----
```

--------------------------------

### Example of Decoded X.509 Certificate Details

Source: https://www.e2encrypted.com/certs/ce71315dc098611f608c6cdeccedc35d18d08548

An example output showing the detailed structure and contents of an X.509 certificate after being decoded by `openssl x509`. This includes version, serial number, signature algorithm, issuer, validity period, subject, public key info, and X509v3 extensions.

```Certificate
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            76:53:fe:b0:af:4b:75:90:a2:1a:e4:a2:d5:f2:76:b5
    Signature Algorithm: ecdsa-with-SHA384
        Issuer: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Document Signing Root E45
        Validity
            Not Before: Mar 18 00:00:00 2020 GMT
            Not After : Mar 18 00:00:00 2045 GMT
        Subject: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Document Signing Root E45
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (384 bit)
                pub:
                    04:86:e5:43:d0:bb:00:65:5e:d6:4a:0a:63:85:9e:
                    45:0f:86:23:32:50:55:49:63:6a:9c:ce:f7:af:f4:
                    7e:20:f9:80:32:5b:6e:b0:ef:f2:c7:a4:2c:fb:6a:
                    59:90:06:76:b7:17:8c:0e:75:44:3a:80:7c:c8:dc:
                    02:3d:f2:ce:a1:9e:b3:4b:72:cb:c6:8c:fd:c2:c9:
                    aa:8c:ae:33:5c:ea:79:4b:dc:69:c8:56:a4:3c:28:
                    41:70:74:8e:6a:1a:48
                ASN1 OID: secp384r1
                NIST CURVE: P-384
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature, Certificate Sign, CRL Sign
            X509v3 Basic Constraints: critical
                CA:TRUE
            X509v3 Subject Key Identifier:
                61:99:02:B4:10:FF:10:3C:DB:7A:DA:6C:3A:70:24:03:60:F1:E7:8E
    Signature Algorithm: ecdsa-with-SHA384
         30:66:02:31:00:8f:f5:c9:3f:b1:4e:f3:f7:d1:9d:b4:ba:0f:
         3d:0a:97:27:10:93:f2:50:7c:22:89:da:8c:d4:ca:a9:63:24:
         26:2a:8b:63:82:63:54:c7:34:f0:d1:9e:7a:18:0b:a7:ea:02:
         31:00:b1:35:8f:4a:f2:fb:26:06:c1:d3:0d:8f:62:d1:b0:c4:
         a0:5d:e9:93:d6:61:c4:e1:a1:b9:5c:a8:f5:f1:67:5e:a2:29:
         37:c2:4b:c6:67:72:fe:8c:90:f9:24:80:77:b7
```

--------------------------------

### Map Command Line Options to JSON Configuration

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

This snippet illustrates how various command-line options correspond to their equivalent parameters within a JSON configuration file. It covers server settings, port numbers, authentication, encryption methods, and other operational parameters, providing a clear guide for configuring the e2encrypted client or server.

```APIDOC
Configuration Mapping:
  Command Line Option -> JSON Configuration Field
  -s some.server.net -> "server": "some.server.net"
  -s some.server.net -p 1234 (client) -> "server": "some.server.net:1234"
  -p 1234 -> "server_port": "1234"
  -b 0.0.0.0 -> "local_address": "0.0.0.0"
  -l 4321 -> "local_port": "4321"
  -k "PasSworD" -> "password": "PasSworD"
  -m "aes-256-cfb" -> "method": "aes-256-cfb"
  -t 60 -> "timeout": 60
  -a nobody -> "user": "nobody"
  --acl "/path/to/acl" -> "acl": "/path/to/acl"
  --fast-open -> "fast_open": true
  --reuse-port -> "reuse_port": true
  --no-delay -> "no_delay": true
  --plugin "obfs-server" -> "plugin": "obfs-server"
  --plugin-opts "obfs=http" -> "plugin_opts": "obfs=http"
  -6 -> "ipv6_first": true
  -n "/etc/nofile" -> "nofile": "/etc/nofile"
  -d "8.8.8.8" -> "nameserver": "8.8.8.8"
```

--------------------------------

### Example Tag with Optional URL Hint for Podcast

Source: https://www.e2encrypted.com/nostr/nips/73

Demonstrates an 'i' tag for a podcast item, including its GUID and an associated Fountain.fm URL hint.

```JSON
["i", "podcast:item:guid:d98d189b-dc7b-45b1-8720-d4b98690f31f", "https://fountain.fm/episode/z1y9TMQRuqXl2awyrQxg"]
```

--------------------------------

### Install Shadowsocks-libev via Snap

Source: https://www.e2encrypted.com/howtos/install-shadowsocks-libev-with-simple-obfs

This snippet provides an alternative, simpler method to install the latest shadowsocks-libev binaries using the Snap package manager. This approach is suitable for various Linux distributions that support Snap, offering a self-contained installation.

```bash
sudo snap install shadowsocks-libev
```