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#!/bin/ash
AUTH_KEYS_DIR="/root/.ssh/authorized_keys.d/"
AUTH_KEYS_FILE="/root/.ssh/authorized_keys"
# do we even have the directory?
[ ! -d "$AUTH_KEYS_DIR" ] && echo "No such directory: $AUTH_KEYS_DIR" && exit 0
mkdir -m 700 $(dirname "$AUTH_KEYS_FILE") 2>/dev/null
TMP=$(mktemp)
[ -s "$AUTH_KEYS_FILE" ] && cat "$AUTH_KEYS_FILE" >> "$TMP"
# ok, lets cat them in the real file
for KEY in "$AUTH_KEYS_DIR"/* ; do
grep -E '(^#|\bssh-.*\sAAA)' "$KEY" >> "$TMP"
done
sort -u "$TMP" > "$AUTH_KEYS_FILE" || cp -f "$TMP" "$AUTH_KEYS_FILE"
rm -f -- "$TMP"
# all done, all good
exit 0
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