晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /lib/kernel/install.d/

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Current File : //lib/kernel/install.d/50-dracut.install
#!/bin/bash

COMMAND="$1"
KERNEL_VERSION="$2"
BOOT_DIR_ABS="$3"
KERNEL_IMAGE="$4"

# If KERNEL_INSTALL_MACHINE_ID is defined but empty, BOOT_DIR_ABS is a fake directory.
# So, let's skip to create initrd.
if ! [[ ${KERNEL_INSTALL_MACHINE_ID-x} ]]; then
    exit 0
fi

if [[ -d "$BOOT_DIR_ABS" ]]; then
    INITRD="initrd"
else
    BOOT_DIR_ABS="/boot"
    INITRD="initramfs-${KERNEL_VERSION}.img"
fi

ret=0
case "$COMMAND" in
    add)
        INITRD_IMAGE_PREGENERATED=${KERNEL_IMAGE%/*}/initrd
        if [[ -f ${INITRD_IMAGE_PREGENERATED} ]]; then
            # we found an initrd at the same place as the kernel
            # use this and don't generate a new one
            cp "$INITRD_IMAGE_PREGENERATED" "$BOOT_DIR_ABS/$INITRD" \
                && chown root:root "$BOOT_DIR_ABS/$INITRD" \
                && chmod 0600 "$BOOT_DIR_ABS/$INITRD" \
                && exit 0
        fi

        if [[ -f /etc/kernel/cmdline ]]; then
            read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
        elif [[ -f /usr/lib/kernel/cmdline ]]; then
            read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
        else
            read -r -d '' -a BOOT_OPTIONS < /proc/cmdline
        fi

        unset noimageifnotneeded

        for ((i=0; i < "${#BOOT_OPTIONS[@]}"; i++)); do
            if [[ ${BOOT_OPTIONS[$i]} == root\=PARTUUID\=* ]]; then
                noimageifnotneeded="yes"
                break
            fi
        done
	dracut -f ${noimageifnotneeded:+--noimageifnotneeded} "$BOOT_DIR_ABS/$INITRD" "$KERNEL_VERSION"
        ret=$?
	;;
    remove)
        rm -f -- "$BOOT_DIR_ABS/$INITRD"
        ret=$?
	;;
esac
exit $ret

haha - 2025