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Installation Clean Up the Standard Installation sudo apt purge debian-faq doc-debian installation-report tasksel sudo apt --purge autoremove Install Essentials sudo apt install bash-completion bind9-dnsutils bzip2 curl ethtool htop iotop screen sudo unzip vim ...

Shell Script Heading #!/usr/bin/env bash # SPDX-License-Identifier: Apache-2.0 # SPDX-FileCopyrightText: 2026 Tomáš Havlas <tomas@havlas.me> Bash "Strict Mode" set -euo pipefail Error Log Function with Timestamp function log() { echo "[$(date +'%Y-%m-%dT%H:%...

Write line same length as variable text head -c "${#VARNAME}" </dev/zero | tr '\0' '-'

Disable Bash History sudo tee "/etc/bash.bashrc" >/dev/null <<'EOF' unset HISTFILE export HISTSIZE=0 export HISTFILESIZE=0 EOF

Limitting NIC Auto-Negotiation Cap Auto-Negotiation at 10 Mbps sudo ethtool -s [NIC] autoneg on advertise 0x002 Cap Auto-Negotiation at 100 Mbps sudo ethtool -s [NIC] autoneg on advertise 0x008 Cap Auto-Negotiation at 1000 Mbps sudo ethtool -s [NIC] autoneg on...