parse and rearrange hostnames

web3.maxi.com
web4.maxi.com
web5.maxi.com
mail1.mexi.com
web6.maxi.com
web9.maxi.com
web9.maxi.com

web11.maxi.com
mail3.mexi.com
web7.maxi.com
mail4.mexi.com
mail25.mexi.com
mail26.mexi.com
mail27.mexi.com
mail28.mexi.com
web8.maxi.com
mail29.mexi.com
mail110.mexi.com
web1.maxi.com

#!/usr/bin/perl -l

use Set::IntSpan;
use File::Slurp qw / slurp / ;

$str = slurp(\ * STDIN);

# Remove redundant whitespace
chop $str;
$str = ~s / ^ [\t] + | [\t] + $ //gm;
$str = ~s / \R + /\n/g;

# Copy $str so we can match numbers in it without disturbing the loop
$nums = $str;

# Parse lines in $str in sequence
while ($str = ~/^(.*)$/gm) {
   $line = $1;

   # Extract bits before and after number
      ($pre, $post) = $line = ~/([^\d]+)\d+(.*)$/m;

   # Check
   if its been printed already
   next
   if $seen {
      $pre.$post
   };

   # If not, extract numbers
   @numbers = $nums = ~/$pre(\d+)$post/g;

   print $pre.
   "["
   .Set::IntSpan - > new(@numbers) - > run_list()
      .
   "]".$post;

   $seen {
      $pre.$post
   } = 1;
}

perl parse.pl < infile

with open("data.txt") as f:
   sites = [x.strip() for x in f]
ranges = []
for x in sites:
   x = x.split(".")
num = int(x[0][x[0].index("web") + 3: ])
if ranges:
   if num - ranges[-1][-1] == 1:
   ranges[-1].append(num)
else:
   ranges.append([num])
else:
   ranges.append([num])
print ranges
print "web[" + ",".join(str(x[0]) if len(x) == 1
   else str(x[0]) + "-" + str(x[-1]) for x in ranges) + "].maxi.com"

[
   [1],
   [3, 4, 5, 6, 7, 8, 9],
   [11]
]
web[1, 3 - 9, 11].maxi.com

#print hosts
lines = open("log.txt").readlines()
numbers = [int(line.split(".")[0][3: ]) for line in lines]
out = [
   []
]
index = 0
for i in xrange(len(numbers) - 1):
   out[index].append(numbers[i])
if (numbers[i + 1] - numbers[i] != 1):
   out.append([])
index += 1
out[-1].append(numbers[-1])
strings = [str(number[0]) if len(number) == 1
   else str(number[0]) + "-" + str(number[-1]) for number in out
]
print ",".join(strings)

import {
   parseDomain,
   ParseResultType
} from "parse-domain";

const parseResult = parseDomain(
   // This should be a string with basic latin letters only.
   // More information below.
   "www.some.example.co.uk"
);

// Check if the domain is listed in the public suffix list
if (parseResult.type === ParseResultType.Listed) {
   const {
      subDomains,
      domain,
      topLevelDomains
   } = parseResult;

   console.log(subDomains); // ["www", "some"]
   console.log(domain); // "example"
   console.log(topLevelDomains); // ["co", "uk"]
} else {
   // Read more about other parseResult types below...
}

npm install parse - domain

import {
   parseDomain,
   fromUrl
} from "parse-domain";

const {
   subDomains,
   domain,
   topLevelDomains
} = parseDomain(
   fromUrl("https://www.münchen.de?query")
);

console.log(subDomains); // ["www"]
console.log(domain); // "xn--mnchen-3ya"
console.log(topLevelDomains); // ["de"]

// You can use the 'punycode' NPM package to decode the domain again
import {
   toUnicode
} from "punycode";

console.log(toUnicode(domain)); // "münchen"

import {
   parseDomain,
   ParseResultType
} from "parse-domain";

const parseResult = parseDomain("münchen.de");

console.log(parseResult.type === ParseResultType.Invalid); // true

import {
   parseDomain,
   ParseResultType,
   Validation
} from "parse-domain";

const parseResult = parseDomain("_jabber._tcp.gmail.com", {
   validation: Validation.Lax,
});

console.log(parseResult.type === ParseResultType.Listed); // true

import {
   parseDomain,
   ParseResultType
} from "parse-domain";

const parseResult = parseDomain("192.168.2.1");

console.log(parseResult.type === ParseResultType.Ip); // true
console.log(parseResult.ipVersion); // 4

sudo vi / etc / cloud / cloud.cfg

preserve_hostname: true

[ec2 - user~] $ sudo hostnamectl set - hostname webserver.mydomain.com

[ec2 - user~] $ sudo reboot

[ec2 - user @webserver~] $ hostname
webserver.mydomain.com

[ec2 - user~] $ sudo hostnamectl set - hostname webserver.mydomain.com

HOSTNAME = webserver.mydomain.com

[ec2 - user~] $ sudo reboot

[ec2 - user @webserver~] $ hostname
webserver.mydomain.com

[ec2 - user~] $ sudo hostnamectl set - hostname webserver.localdomain