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/dracut/modules.d/95nbd/

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Current File : //lib/dracut/modules.d/95nbd/parse-nbdroot.sh
#!/bin/sh
#
# Preferred format:
#       root=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
#       [root=*] netroot=nbd:srv:port/exportname[:fstype[:rootflags[:nbdopts]]]
#
# nbdopts is a comma separated list of options to give to nbd-client
#
# root= takes precedence over netroot= if root=nbd[...]
#

# Sadly there's no easy way to split ':' separated lines into variables
netroot_to_var() {
    local v=${1}:
    set --
    while [ -n "$v" ]; do
        set -- "$@" "${v%%:*}"
        v=${v#*:}
    done

    unset server port
    server=$2; port=$3;
}

# This script is sourced, so root should be set. But let's be paranoid
[ -z "$root" ] && root=$(getarg root=)

if [ -z "$netroot" ]; then
    for netroot in $(getargs netroot=); do
        [ "${netroot%%:*}" = "nbd" ] && break
    done
    [ "${netroot%%:*}" = "nbd" ] || unset netroot
fi

# Root takes precedence over netroot
if [ "${root%%:*}" = "nbd" ] ; then
    if [ -n "$netroot" ] ; then
        warn "root takes precedence over netroot. Ignoring netroot"

    fi
    netroot=$root
    unset root
fi

# If it's not nbd we don't continue
[ "${netroot%%:*}" = "nbd" ] || return


if [ -n "${DRACUT_SYSTEMD}" ] && [ "$root" = "dhcp" ]; then
    echo "root=$netroot" > /etc/cmdline.d/root.conf
    systemctl --no-block daemon-reload
fi

# Check required arguments
netroot_to_var $netroot
[ -z "$server" ] && die "Argument server for nbdroot is missing"
[ -z "$port" ] && die "Argument port for nbdroot is missing"

# NBD actually supported?
incol2 /proc/devices nbd || modprobe nbd || die "nbdroot requested but kernel/initrd does not support nbd"

# Done, all good!
rootok=1

# Shut up init error check
if [ -z "$root" ]; then
    root=block:/dev/root
    wait_for_dev -n /dev/root
fi

haha - 2025