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　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。 . Prv8 Shell

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Directory : /lib/dracut/modules.d/95ssh-client/

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Current File : //lib/dracut/modules.d/95ssh-client/module-setup.sh

#!/bin/bash

# fixme: assume user is root

# called by dracut
check() {
    [[ $mount_needs ]] && return 1

    # If our prerequisites are not met, fail.
    require_binaries ssh scp  || return 1

    if [[ $sshkey ]]; then
        [ ! -f $sshkey ] && {
            derror "ssh key: $sshkey is not found!"
            return 1
        }
    fi

    return 255
}

# called by dracut
depends() {
    # We depend on network modules being loaded
    echo network
}

inst_sshenv()
{
    if [ -d /root/.ssh ]; then
        inst_dir /root/.ssh
        chmod 700 ${initdir}/root/.ssh
    fi

    # Copy over ssh key and knowhosts if needed
    [[ $sshkey ]] && {
        inst_simple $sshkey
        [[ -f /root/.ssh/known_hosts ]] && inst_simple /root/.ssh/known_hosts
        [[ -f /etc/ssh/ssh_known_hosts ]] && inst_simple /etc/ssh/ssh_known_hosts
    }

    # Copy over root and system-wide ssh configs.
    [[ -f /root/.ssh/config ]] && inst_simple /root/.ssh/config
    if [[ -f /etc/ssh/ssh_config ]]; then
        inst_simple /etc/ssh/ssh_config
        sed -i -e 's/\(^[[:space:]]*\)ProxyCommand/\1# ProxyCommand/' ${initdir}/etc/ssh/ssh_config
        while read key val || [ -n "$key" ]; do
            if [[ $key == "GlobalKnownHostsFile" ]]; then
                inst_simple "$val"
            # Copy customized UserKnowHostsFile
            elif [[ $key == "UserKnownHostsFile" ]]; then
                # Make sure that ~/foo will be copied as /root/foo in kdump's initramfs
                if str_starts "$val" "~/"; then
                    val="/root/${val#"~/"}"
                fi
                inst_simple "$val"
            fi
        done < /etc/ssh/ssh_config
    fi

    return 0
}

# called by dracut
install() {
    local _nsslibs

    inst_multiple ssh scp
    inst_sshenv

    _nsslibs=$(sed -e '/^#/d' -e 's/^.*://' -e 's/\[NOTFOUND=return\]//' /etc/nsswitch.conf \
        |  tr -s '[:space:]' '\n' | sort -u | tr -s '[:space:]' '|')
    _nsslibs=${_nsslibs#|}
    _nsslibs=${_nsslibs%|}

    inst_libdir_file -n "$_nsslibs" 'libnss_*.so*'
}

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