madalinignisca

Claude Code VM Setup

Idempotent bootstrap script for an Ubuntu 24.04 LTS development VM
optimised for Claude Code agent sessions.

Run it once to install everything. Run it again to update. Safe, transparent, and documented at every step.

---

Why this script?

madalinignisca

# Beware! This file is rewritten by htop when settings are changed in the interface.
# The parser is also very primitive, and not human-friendly.
# requires libsensors
htop_version=3.2.2
config_reader_min_version=3
fields=0 48 17 18 38 39 40 2 46 47 49 1
hide_kernel_threads=1
hide_userland_threads=0
hide_running_in_container=1
shadow_other_users=0

madalinignisca

Some benchmark results.

Comparison of current results:

Server	Total time (s)	Transactions (total)	TPS	Queries (total)	QPS	Read (total)	Write (total)	Other (total)	Latency avg (ms)	Latency 95th percentile (ms)
Server AX102 (btrfs: compression=zstd:3)	60.00	147,450	2,457.32	2,949,000	49,146.33	2,064,300	589,800	294,900	3.25	4.91
Cloud Server CAX31	60.01	100,983	1,682.83	2,023,574	33,721.77	1,417,164	404,201	202,209	4.75	7.98

Notes:

madalinignisca

// unattended_upgrades_setup.go
package main

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"log"

madalinignisca

#!/bin/bash

# setup_unattended_upgrades.sh
# This script configures Debian's Unattended Upgrades to:
# 1. Automatically update all packages.
# 2. Automatically restart services after upgrades.
# 3. Automatically respond "no" to configuration file replacement prompts.
# 4. Limit system reboots to once every two weeks if strictly required.

set -e  # Exit immediately if a command exits with a non-zero status.

madalinignisca

UFW

I use Ubuntu’s Uncomplicated firewall because it is available on Ubuntu and it's very simple.

Install UFW

if ufw is not installed by default be sure to install it first.

madalinignisca

d-i debian-installer/locale string en_US.UTF-8
d-i debian-installer/language string en
d-i debian-installer/country string ES
d-i keyboard-configuration/xkb-keymap select us

d-i netcfg/choose_interface select auto

d-i hw-detect/load_firmware boolean true

d-i mirror/protocol string http

madalinignisca

If you can connect using psql, then you can use this command:

postgres=# SHOW data_directory;
data_directory
-----------------------
/opt/postgres/data/

| directory | description |

madalinignisca

BEGIN TRANSACTION;
  ALTER SCHEMA public          RENAME TO public_original;
  ALTER SCHEMA my_db           RENAME TO public;
  DROP SCHEMA  public_original CASCADE;
COMMIT;

madalinignisca

package main

import (
    "fmt"
    "net/http"
)

func helloWorld(w http.ResponseWriter, r *http.Request) {
    // this is what you want
    if r.URL.Path != "/" {