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curl -fsSL https://engineerisaac.com/download/mint_enable_autologin.sh | head -n 20 |
This is for convinence for you. You dont have to use the direct download bash command. However it will assume the native user is the default user and auto login to that account.
This will excute this code
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#!/usr/bin/env bash
set -euo pipefail
if [[ "${EUID}" -ne 0 ]]; then
exec sudo -E bash "$0" "$@"
fi
ts() { date +"%Y%m%d_%H%M%S"; }
die() { echo "ERROR: $*" >&2; exit 1; }
backup_file() {
local f="$1"
[[ -f "$f" ]] || return 0
local b="${f}.bak.$(ts)"
cp -a "$f" "$b"
echo "Backup: $b"
}
guess_user() {
if [[ -n "${1:-}" ]]; then
echo "$1"
return 0
fi
if [[ -n "${SUDO_USER:-}" && "${SUDO_USER}" != "root" ]]; then
echo "${SUDO_USER}"
return 0
fi
local ln
ln="$(logname 2>/dev/null || true)"
if [[ -n "$ln" && "$ln" != "root" ]]; then
echo "$ln"
return 0
fi
die "Could not determine target username. Run: sudo $0 YOUR_USERNAME"
}
detect_dm() {
if [[ -f /etc/X11/default-display-manager ]]; then
local dm_path
dm_path="$(cat /etc/X11/default-display-manager 2>/dev/null || true)"
case "$dm_path" in
*lightdm*) echo "lightdm"; return 0 ;;
*gdm3*) echo "gdm3"; return 0 ;;
*sddm*) echo "sddm"; return 0 ;;
esac
fi
if systemctl list-unit-files 2>/dev/null | grep -qE '^lightdm\.service'; then echo "lightdm"; return 0; fi
if systemctl list-unit-files 2>/dev/null | grep -qE '^gdm3\.service'; then echo "gdm3"; return 0; fi
if systemctl list-unit-files 2>/dev/null | grep -qE '^sddm\.service'; then echo "sddm"; return 0; fi
die "Could not detect display manager (lightdm/gdm3/sddm)."
}
choose_session() {
local desired="${SESSION:-}"
if [[ -n "$desired" ]]; then
echo "$desired"
return 0
fi
if [[ -d /usr/share/xsessions ]]; then
[[ -f /usr/share/xsessions/cinnamon.desktop ]] && { echo "cinnamon"; return 0; }
[[ -f /usr/share/xsessions/mate.desktop ]] && { echo "mate"; return 0; }
[[ -f /usr/share/xsessions/xfce.desktop ]] && { echo "xfce"; return 0; }
fi
echo "cinnamon"
}
enable_lightdm() {
local user="$1"
local dir="/etc/lightdm/lightdm.conf.d"
local conf="${dir}/50-autologin.conf"
mkdir -p "$dir"
backup_file "$conf"
printf "[Seat:*]\nautologin-user=%s\nautologin-user-timeout=0\n" "$user" > "$conf"
chmod 0644 "$conf"
echo "Configured LightDM autologin in: $conf"
}
enable_gdm3() {
local user="$1"
local conf="/etc/gdm3/custom.conf"
[[ -f "$conf" ]] || die "Expected $conf to exist, but it does not."
backup_file "$conf"
local tmp
tmp="$(mktemp)"
awk -v user="$user" '
BEGIN {
in_daemon=0
seen_daemon=0
set_enable=0
set_user=0
}
/^\[daemon\][[:space:]]*$/ {
seen_daemon=1
in_daemon=1
print
next
}
/^\[[^]]+\][[:space:]]*$/ {
if (in_daemon==1) {
if (set_enable==0) print "AutomaticLoginEnable=True"
if (set_user==0) print "AutomaticLogin=" user
in_daemon=0
}
print
next
}
{
if (in_daemon==1) {
if ($0 ~ /^[[:space:]]*AutomaticLoginEnable[[:space:]]*=/) { print "AutomaticLoginEnable=True"; set_enable=1; next }
if ($0 ~ /^[[:space:]]*AutomaticLogin[[:space:]]*=/) { print "AutomaticLogin=" user; set_user=1; next }
}
print
}
END {
if (in_daemon==1) {
if (set_enable==0) print "AutomaticLoginEnable=True"
if (set_user==0) print "AutomaticLogin=" user
}
if (seen_daemon==0) {
print ""
print "[daemon]"
print "AutomaticLoginEnable=True"
print "AutomaticLogin=" user
}
}' "$conf" >"$tmp"
cat "$tmp" >"$conf"
rm -f "$tmp"
chmod 0644 "$conf"
echo "Configured GDM3 autologin in: $conf"
}
enable_sddm() {
local user="$1"
local session="$2"
local dir="/etc/sddm.conf.d"
local conf="${dir}/99-autologin.conf"
mkdir -p "$dir"
backup_file "$conf"
printf "[Autologin]\nUser=%s\nSession=%s\nRelogin=true\n" "$user" "$session" > "$conf"
chmod 0644 "$conf"
echo "Configured SDDM autologin in: $conf"
}
main() {
local user
user="$(guess_user "${1:-}")"
id "$user" >/dev/null 2>&1 || die "User '$user' does not exist."
local dm
dm="$(detect_dm)"
echo "Target user: $user"
echo "Detected display manager: $dm"
case "$dm" in
lightdm) enable_lightdm "$user" ;;
gdm3) enable_gdm3 "$user" ;;
sddm)
local session
session="$(choose_session)"
echo "SDDM session: $session (override with: SESSION=... )"
enable_sddm "$user" "$session"
;;
*) die "Unsupported display manager: $dm" ;;
esac
echo "Done. Reboot to apply: sudo reboot"
}
main "$@" |