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* Backup file if modified since system birth * Symlink /etc/resolv.conf -> systemd-resolve's stub resolver
22 lines
915 B
Bash
22 lines
915 B
Bash
echo "Symlink systemd-resolved to /etc/resolv.conf"
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# Backup if /etc/resolv.conf was modified after system birth
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system_birth=$(stat -c %W /)
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resolvconf_modified=$(stat -c %Y /etc/resolv.conf)
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# Run a backup if resolv.conf isn't a symlink and was modified after install
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if [[ -s /etc/resolv.conf ]] && [[ ! -L /etc/resolv.conf ]] && [[ $resolvconf_modified > $system_birth ]]; then
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# Backup the destination file (with timestamp) to avoid clobbering (Ex: resolv.conf.bak.1753817951)
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backup_file="/etc/resolv.conf.bak.$(date +%s)"
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# Create backup
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sudo cp -f /etc/resolv.conf "$backup_file" 2>/dev/null
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# Inform users
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echo -e "\e[31mReplaced /etc/resolv.conf with symlink to systemd-resolved. \nSaved backup as ${backup_file}.\e[0m"
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echo -e "\e[31mSee https://wiki.archlinux.org/title/Systemd-resolved.\e[0m"
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fi
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# Write the symlink
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sudo ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
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