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add update.sh: OS detection + package list update

- New update.sh: detects Alpine, Arch, Debian/Ubuntu, RHEL/Fedora/CentOS,
  openSUSE, Void, Gentoo and updates the package index only (no upgrades)
- clean.sh fixes:
  - Fix ((cleaned_count++)) exiting under set -e on first successful rm
  - Stop recursively deleting /var/cache and /root/.cache wholesale
  - Add CACHE_RETENTION_DAYS (7d) — clean_directory now only deletes
    files older than retention period instead of wiping everything
  - Remove dangerous rm -rf fallback in clean_directory
  - Narrow CACHE_DIRS to /var/cache/apt instead of /var/cache
  - Fix /home/*/.cache pattern to only target pip/npm caches

2026-06-25 19:42:51 -03:00

2.4 KiB

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server-scripts

Useful scripts for managing servers written in Bash. Supported OS includes Debian/Ubuntu, Alpine, Arch, RHEL/Fedora/CentOS, openSUSE, Void, and Gentoo.

In the past I was using it more for maintaining my home servers, bare metal with Docker, however when I changed to k3s, I started using it less. Now I'm using this as a collection of useful scripts that I can use when needed. Also clean.sh is still useful.

`clean.sh`

This script is used to clean some of the files, docker dangling images, and docker stopped/unused containers.

`update.sh`

Detects the running OS (Alpine, Arch, Debian/Ubuntu, RHEL/Fedora/CentOS, openSUSE, Void, Gentoo) and updates the package list only — it does not upgrade or install any packages. Useful for keeping package indexes fresh so that upgrade commands run faster later.

Run with curl | bash:

curl -sSL https://git.ivanch.me/ivanch/server-scripts/raw/branch/main/update.sh | bash

`windows-backup.ps1`

This PowerShell script is used to backup files from a Windows machine to a remote Samba server. It uses 7zip to create the zip file, and then sends over the network using SMB protocol.

`dns-override.sh`

Aggressive, best-effort DNS override script for Linux hosts with support for multiple resolver stacks (systemd-resolved, NetworkManager, resolvconf/openresolv, dhclient, systemd-networkd, and ifupdown) plus direct /etc/resolv.conf writes.

It prompts for:

2 required DNS servers
1 optional third DNS server

Validation/features:

Accepts IPv4 and IPv6 literals
Rejects invalid or duplicate entries
Performs reachability checks (warn-only, does not block execution)
Can optionally lock /etc/resolv.conf with chattr +i

Run with curl | bash:

curl -sSL https://git.ivanch.me/ivanch/server-scripts/raw/branch/main/dns-override.sh | bash

Important notes:

Requires interactive TTY input (prompts are read from /dev/tty)
Requires root privileges (sudo is used/re-execed when possible)
Script is intentionally aggressive and may restart/reload network services
On heavily managed systems (custom agents, immutable images, enterprise policy), behavior is still best-effort

Haven Notify

It's a small internal service designed to send notifications to a specified Discord channel via webhooks. It's written in Go and can be easily deployed.

The project is defined on /haven-notify folder.

2.4 KiB Raw Blame History

server-scripts

clean.sh

update.sh

windows-backup.ps1