最近打算升级一台服务器,上边部署有一个wordpress站点,升级跨度挺大,而且站点上的wp程序又好久没有更新,怕升级后wp与系统不兼容,所以在这之前需要备份一下站点。  (图源 :[pixabay](https://pixabay.com/photos/lightbulb-idea-creativity-base-3104355/)) 站点有两部分主要数据,分别是站点上的程序文件(*.php一堆)、图片等,以及站点的MySQL数据库。 文件我们使用tar直接打包即可,那么数据库该如何备份呢?我没记错的话,WP后台就有备份功能,但是好久没有登录后台,现在用户名密码早就忘干净了,就算是想起来,现在后台还能用不能用也两说呢。 # 备份语句 那么剩下方法大概就只能是直接备份数据库啦,使用的工具就是`mysqldump`,一款我十多年前几乎每天都在用的工具,现在咋用都忘得差不多啦。 不过好在这个工具用起来很简单,直接使用如下语句即可: > `sudo mysqldump -u root -p --default-character-set=utf8 database_name > dump.sql` (注:为了让中文被正确处理,加入`--default-character-set=utf8`参数,注意是`utf8`而不是`utf-8`) 其中`database_name`为我们要备份的数据库名,如果不清楚数据库名,可以使用mysql命令行客户端链接,并使用`SHOW DATABASES;`指令查询。 在我的服务器上,操作如下: >` sudo mysql -u root -p` 登录后,执行`SHOW DATABASES;`指令,显示结果如下: ``` mysql> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | wordpressdb | | sys | +--------------------+ 5 rows in set (0.00 sec) ``` 其中,`wordpressdb`就是我们的数据库啦,另外几个都是系统相关的数据库,我们不用去理会。 # 关于权限 这里额外插播一点信息,原本MySQL是可以在Linux的普通用户下连接MYSQL root用户的(亦即不使用`sudo`即可完成上述操作),但是这次试了一下竟然不可以用。 而且更诡异的是,使用了`sudo`(亦即root权限后),`mysql`或者`mysqldump`竟然可以使用任意密码登录到MySQL的`root`用户(亦即原本设置的密码都无效了)。 我粗略地了解了一下,可能是MySQL中验证插件的变化: ``` mysql> use mysql Database changed mysql> select host, user, plugin from user; +-----------+------------------+-----------------------+ | host | user | plugin | +-----------+------------------+-----------------------+ | localhost | root | auth_socket | | localhost | mysql.session | mysql_native_password | | localhost | mysql.sys | mysql_native_password | | localhost | debian-sys-maint | mysql_native_password | | localhost | sitexxxx_wpuser | mysql_native_password | +-----------+------------------+-----------------------+ 5 rows in set (0.00 sec) ``` (通过这个可以看到` root`对应的验证插件为`auth_socket`) 虽然我没太理解这个`auth_socket`工作机制,也可以将`root`的`plugin`修改为`mysql_native_password`,并重新设置密码。但是貌似用`sudo`也没啥不好的,所以就这么将就用吧(毕竟这台VPS只有我自己用)。 # 备份与恢复 至此,我们做好了备份前的学习准备,然后执行上文提到的备份语句: >`sudo mysqldump -u root -p --default-character-set=utf8 database_name > dump.sql` 就会将对应的数据库(注意修改其中的数据库名称)DUMP到一个SQL文件中,查看这个sql文件,我们会发现其中有类似这样的创建数据表语句:  以及类似这样的`INSERT INTO `wp_posts` VALUES `等数据插入语句。 也就是说我们备份的没有问题,将上述文件使用`tar`打包,再用`scp`下载到本地或者上传到其它服务器,我们就完成了数据库的备份。 同理,打包站点`www`目录下的文件,并下载到本地或上传到其它服务器,我们就完成了网页内容的备份。 恢复也是十分简单,对于网页备份,下载网页备份被解压到相应目录。 对于数据库备份,下载数据库备份被解压,然后执行如下指令即可: >`sudo mysql -u root -ppassword database_name < dump.sql` 是不是很简单呀? # 接下来做什么 做好备份以后,我们就可以放心地升级服务器了,理论上,有直接升级成功的可能(那样我们就无需去手工恢复站点文件以及数据库内容啦)。 一旦升级失败,我就得将服务器系统恢复至原来的低版本系统,然后再手工恢复站点文件以及数据库备份,唉,想想就很累。我这苦命的人啊! 什么,万一这过程中有啥疏漏怎么办?其实云服务提供商那边我还购买了VPS的备份服务,可以从主机商那边恢复。(不过以前弄过一次,他们的服务有BUG,我差点累死)。 什么,万一升级失败、我的备份也有疏漏,主机商的备份也恢复失败可咋办?万一那种情况真的发生,O哥只能认命了,爱咋咋地呗,反正其实这个网站也没几个人用。 死猪不怕开水烫,就是我啦! # 相关链接 * [mysqldump — A Database Backup Program](https://dev.mysql.com/doc/refman/8.3/en/mysqldump.html) * [Dumping Data in SQL Format with mysqldump](https://dev.mysql.com/doc/refman/8.3/en/mysqldump-sql-format.html) * [Reloading SQL-Format Backups](https://dev.mysql.com/doc/refman/8.3/en/reloading-sql-format-dumps.html)
author | oflyhigh |
---|---|
permlink | mysqldump-wordpress-mysql |
category | hive-105017 |
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created | 2024-03-22 10:44:48 |
last_update | 2024-03-22 10:44:48 |
depth | 0 |
children | 8 |
last_payout | 2024-03-29 10:44:48 |
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pending_payout_value | 0.000 HBD |
promoted | 0.000 HBD |
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root_title | "温故而知新:使用mysqldump备份WordPress MySQL数据库" |
beneficiaries | [] |
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percent_hbd | 10,000 |
post_id | 132,244,724 |
net_rshares | 182,508,180,009,501 |
author_curate_reward | "" |
voter | weight | wgt% | rshares | pct | time |
---|---|---|---|---|---|
abit | 0 | 25,864,994,066,235 | 100% | ||
adm | 0 | 22,772,842,139,680 | 100% | ||
good-karma | 0 | 11,011,391,040 | 1% | ||
ezzy | 0 | 933,493,976 | 26% | ||
ubg | 0 | 47,451,479,437 | 100% | ||
deanliu | 0 | 4,626,623,449,372 | 100% | ||
exyle | 0 | 56,282,571,896 | 26% | ||
andyjim | 0 | 488,370,367 | 100% | ||
joythewanderer | 0 | 147,449,381 | 100% | ||
ace108 | 0 | 1,058,823,127,121 | 25% | ||
logic | 0 | 175,061,662,772 | 100% | ||
magicmonk | 0 | 5,299,176,711,016 | 100% | ||
laoyao | 0 | 67,288,194,757 | 100% | ||
midnightoil | 0 | 237,626,687,169 | 100% | ||
xiaohui | 0 | 20,977,279,475 | 100% | ||
joele | 0 | 49,459,987,957 | 100% | ||
bert0 | 0 | 150,221,190 | 20% | ||
rivalhw | 0 | 2,704,278,536,789 | 100% | ||
nextgen622 | 0 | 6,704,745,434 | 100% | ||
helene | 0 | 1,509,856,597,995 | 100% | ||
ffcrossculture | 0 | 157,918,048,106 | 100% | ||
netaterra | 0 | 163,043,635,833 | 10% | ||
daveks | 0 | 3,602,890,623,069 | 100% | ||
penguinpablo | 0 | 215,475,000,257 | 14% | ||
cnfund | 0 | 109,856,633,211 | 50% | ||
funnyman | 0 | 1,479,422,163 | 5.6% | ||
steemcleaners | 0 | 2,377,481,911,851 | 80% | ||
btshuang | 0 | 746,785,498 | 50% | ||
esteemapp | 0 | 2,813,084,031 | 1% | ||
azazqwe | 0 | 106,475,889,166 | 100% | ||
bxt | 0 | 457,951,312,216 | 100% | ||
evildeathcore | 0 | 6,274,967,034 | 100% | ||
alexis555 | 0 | 4,681,551,610,141 | 39% | ||
oneshot | 0 | 34,525,880,891 | 100% | ||
trafalgar | 0 | 50,436,420,604,741 | 100% | ||
itinerantph | 0 | 1,697,279,790 | 50% | ||
lizanomadsoul | 0 | 2,489,818,081 | 1% | ||
raindrop | 0 | 780,690,635,513 | 100% | ||
passion-fruit | 0 | 12,479,601,820 | 92% | ||
fortune-master | 0 | 12,418,164,990 | 92% | ||
mobbs | 0 | 268,997,251,029 | 100% | ||
ribalinux | 0 | 91,795,636,183 | 100% | ||
nrg | 0 | 421,239,419,247 | 100% | ||
nanosesame | 0 | 84,264,270,892 | 80% | ||
exec | 0 | 2,005,943,049,695 | 100% | ||
eval | 0 | 3,921,034,914,049 | 100% | ||
joeyarnoldvn | 0 | 571,515,400 | 1.76% | ||
geekgirl | 0 | 3,169,070,619,578 | 100% | ||
susanli3769 | 0 | 965,004,147,545 | 100% | ||
eturnerx | 0 | 20,588,181,137 | 1.9% | ||
mrpointp | 0 | 534,150,366,332 | 100% | ||
travelgirl | 0 | 221,207,240,070 | 100% | ||
mygod | 0 | 743,197,974 | 50% | ||
catwomanteresa | 0 | 505,522,860,479 | 100% | ||
dine77 | 0 | 55,806,568,442 | 70% | ||
pocketrocket | 0 | 16,697,231,700 | 100% | ||
ahlawat | 0 | 11,383,119,968 | 20.4% | ||
idx | 0 | 28,625,438,668 | 100% | ||
aafeng | 0 | 930,656,443,896 | 100% | ||
cn-reader | 0 | 18,903,832,730 | 50% | ||
tvb | 0 | 4,246,030,809 | 30% | ||
floatinglin | 0 | 8,124,898,542 | 100% | ||
mrspointm | 0 | 653,838,851,493 | 100% | ||
stoodkev | 0 | 24,430,962,389,251 | 100% | ||
kimzwarch | 0 | 17,322,206,701 | 4% | ||
artonmysleeve | 0 | 9,553,628,521 | 50% | ||
lymichale | 0 | 20,016,550,065 | 100% | ||
yellowbird | 0 | 696,752,145 | 100% | ||
joshman | 0 | 226,955,508,126 | 25% | ||
chenlocus | 0 | 93,916,248,620 | 100% | ||
fatman | 0 | 9,073,982,282 | 2% | ||
silversaver888 | 0 | 353,724,308,836 | 100% | ||
minloulou | 0 | 5,516,070,135 | 70% | ||
msp-makeaminnow | 0 | 21,274,947,873 | 24.8% | ||
hqy | 0 | 12,355,111,110 | 100% | ||
gtpjfoodbank | 0 | 4,288,233,572 | 90% | ||
esteem.app | 0 | 339,293,147 | 1% | ||
japanguide | 0 | 1,619,483,455 | 100% | ||
jychbetter | 0 | 801,224,624,819 | 100% | ||
winniex | 0 | 470,816,540,871 | 100% | ||
devosdevosi | 0 | 2,126,263,429 | 100% | ||
etherpunk | 0 | 3,732,359,661 | 50% | ||
travoved | 0 | 25,031,592,555 | 100% | ||
traf | 0 | 4,247,114,263,090 | 100% | ||
ioioioioi | 0 | 2,257,046,298 | 100% | ||
itchyfeetdonica | 0 | 901,151,301,207 | 100% | ||
nathen007 | 0 | 219,957,707,271 | 100% | ||
breelikeatree | 0 | 196,382,545,261 | 100% | ||
ahmadmangazap | 0 | 1,975,241,223 | 0.5% | ||
wiseagent | 0 | 3,382,992,044 | 10.2% | ||
cryptonized | 0 | 235,923,033 | 14% | ||
daltono | 0 | 297,591,861,700 | 24% | ||
soufianechakrouf | 0 | 3,475,358,392 | 100% | ||
belemo | 0 | 16,598,223,249 | 100% | ||
mermaidvampire | 0 | 2,144,688,674 | 100% | ||
manncpt | 0 | 1,727,466,206 | 1% | ||
seikatsumkt | 0 | 5,328,388,379 | 75% | ||
jnmarteau | 0 | 477,416,088 | 1% | ||
emmali | 0 | 240,647,964,492 | 100% | ||
unconditionalove | 0 | 1,624,368,673 | 13% | ||
rubelynmacion | 0 | 27,501,222,168 | 100% | ||
arac | 0 | 469,744,023 | 100% | ||
lisfabian | 0 | 13,975,088,348 | 50% | ||
grzegorz2047 | 0 | 3,246,649,387 | 100% | ||
louis88 | 0 | 389,767,434,808 | 20% | ||
tresor | 0 | 58,717,575,988 | 20% | ||
cedricguillas | 0 | 252,868,385,233 | 100% | ||
el-dee-are-es | 0 | 5,162,017,880 | 10% | ||
crypticat | 0 | 967,185,522 | 0.4% | ||
hmayak | 0 | 34,936,463,660 | 100% | ||
archisteem | 0 | 1,274,556,179 | 7.5% | ||
dses | 0 | 56,415,974,642 | 80% | ||
digital.mine | 0 | 77,226,668,485 | 70% | ||
ambiguity | 0 | 44,575,319,973 | 100% | ||
smartvote | 0 | 107,368,765,388 | 4.4% | ||
julian2013 | 0 | 77,433,910,798 | 100% | ||
voxmortis | 0 | 37,603,794,501 | 20% | ||
voter001 | 0 | 21,246,708,075 | 20.4% | ||
voter000 | 0 | 21,320,488,185 | 45.5% | ||
pet.society | 0 | 14,680,708,168 | 6% | ||
reetuahlawat | 0 | 3,481,117,794 | 100% | ||
minminlou | 0 | 557,223,316 | 56% | ||
annepink | 0 | 704,446,208,532 | 100% | ||
cakemonster | 0 | 6,601,520,779 | 13% | ||
jacuzzi | 0 | 635,553,308 | 1.4% | ||
lestrange | 0 | 7,261,784,583 | 90% | ||
fusion.lover | 0 | 37,379,770,726 | 100% | ||
hungrybear | 0 | 577,869,142 | 14% | ||
hungryharish | 0 | 1,582,092,107 | 6.5% | ||
lovelemon | 0 | 270,975,270,648 | 100% | ||
photographercr | 0 | 4,315,350,004 | 20% | ||
radaquest | 0 | 240,823,370,331 | 40% | ||
dailyke20 | 0 | 2,647,810,410 | 100% | ||
omnivori | 0 | 2,174,325,851 | 90% | ||
ying82 | 0 | 164,958,325,133 | 100% | ||
steemindian | 0 | 517,541,679 | 13% | ||
jimhawkins | 0 | 527,067,589 | 64% | ||
kgswallet | 0 | 703,067,970 | 13% | ||
steem.leo | 0 | 1,536,341,138 | 26% | ||
atyh | 0 | 318,224,424,783 | 100% | ||
janaveda | 0 | 16,553,608,184 | 100% | ||
bilpcoinbot1 | 0 | 0 | 100% | ||
urun | 0 | 17,339,351,939 | 100% | ||
moleah | 0 | 666,034,382 | 100% | ||
gigel2 | 0 | 1,031,356,188,816 | 100% | ||
vickyli | 0 | 179,935,953,800 | 100% | ||
marygong77777 | 0 | 205,646,245,618 | 100% | ||
bilpcoin.pay | 0 | 541,719,357 | 10% | ||
dbfoodbank | 0 | 4,250,779,968 | 76% | ||
lnakuma | 0 | 50,952,396,268 | 100% | ||
weddinggift | 0 | 1,900,264,647 | 100% | ||
invest2learn | 0 | 659,754,394 | 26% | ||
stoodmonsters | 0 | 44,840,052,988 | 100% | ||
ribary | 0 | 9,528,576,063 | 13% | ||
kgsupport | 0 | 2,517,331,212 | 50% | ||
warmstill | 0 | 830,073,181 | 50% | ||
bilpcoinbpc | 0 | 1,111,482,133 | 5% | ||
mice-k | 0 | 506,309,730 | 26% | ||
julesquirin | 0 | 9,108,152,567 | 20% | ||
dpend.active | 0 | 1,847,430,827 | 5.2% | ||
shinoxl | 0 | 2,187,613,289 | 100% | ||
lovequeen | 0 | 361,094,117,096 | 100% | ||
hivebuzz | 0 | 3,724,344,198 | 1% | ||
hivewatchers | 0 | 1,927,573,088 | 55% | ||
bnk | 0 | 6,902,138,182 | 20% | ||
dcityrewards | 0 | 250,777,812,517 | 26% | ||
holoferncro | 0 | 2,317,586,055 | 5% | ||
sketching | 0 | 1,311,494,123 | 13% | ||
ecency | 0 | 534,387,187,877 | 1% | ||
jywahaha | 0 | 1,849,139,840 | 100% | ||
roberto58 | 0 | 9,675,194,850 | 100% | ||
cronicasdelcesar | 0 | 4,967,983,445 | 100% | ||
jelly13 | 0 | 1,174,930,096 | 13% | ||
olaunlimited | 0 | 738,628,494 | 45% | ||
ecency.stats | 0 | 380,972,555 | 1% | ||
evahe | 0 | 333,170,966,108 | 100% | ||
blogstats | 0 | 638,467,908 | 100% | ||
philipmak | 0 | 1,496,309,742 | 50% | ||
bulkathos | 0 | 42,876,225,112 | 100% | ||
netaterra.leo | 0 | 540,615,721 | 9% | ||
cocaaladioxine | 0 | 4,678,490,290 | 85% | ||
gameexp | 0 | 14,574,000,048 | 100% | ||
belemo.leo | 0 | 471,087,110 | 100% | ||
eturnerx-dbuzz | 0 | 21,322,580,759 | 67.5% | ||
drricksanchez | 0 | 53,844,814,039 | 10% | ||
hive.friends | 0 | 0 | 1% | ||
dengyanping888 | 0 | 135,499,936,629 | 100% | ||
merwinrod | 0 | 3,108,302,490 | 100% | ||
lovelingling | 0 | 232,480,253,126 | 100% | ||
mao317 | 0 | 6,901,238,618 | 100% | ||
zhangyan-123 | 0 | 236,769,117,072 | 100% | ||
alpha-omega | 0 | 56,642,555,293 | 50.7% | ||
tanzil2024 | 0 | 140,239,035,865 | 100% | ||
aequi | 0 | 19,590,922,415 | 100% | ||
mimi.ruby | 0 | 202,163,105,736 | 100% | ||
pappyelblanco | 0 | 501,232,111 | 50% | ||
zpek | 0 | 1,695,714,767 | 100% | ||
almajandra | 0 | 8,800,257,918 | 100% | ||
ssebasv | 0 | 2,863,758,336 | 100% | ||
drexlord | 0 | 2,143,825,535 | 5% | ||
privatblog | 0 | 137,958,184,680 | 100% | ||
hoffmeister84 | 0 | 14,199,803,021 | 100% | ||
apoklipsix | 0 | 2,752,871,663 | 49% | ||
zuun.net | 0 | 3,736,573,552 | 28% | ||
yelimarin | 0 | 66,150,029,685 | 100% | ||
mikezillo | 0 | 14,424,863,560 | 100% | ||
pero82 | 0 | 4,579,629,745 | 40% | ||
xianlaiyiju | 0 | 20,788,991,722 | 100% | ||
love5200 | 0 | 38,077,021,598 | 100% | ||
xiaoyaodidi | 0 | 121,837,448,309 | 100% | ||
franzpaulie | 0 | 39,811,405,738 | 100% | ||
eric.gundam | 0 | 1,500,399,152 | 64% | ||
the13anarchist | 0 | 735,988,256 | 6% | ||
brutus22 | 0 | 978,820,573 | 12% | ||
bgmoha | 0 | 3,941,866,604 | 55% | ||
queercoin | 0 | 238,811,191,113 | 100% | ||
jhero22 | 0 | 25,779,816,656 | 95% | ||
hbcpt | 0 | 29,824,016,843 | 100% | ||
ecencypoints | 0 | 4,389,758,449 | 25% | ||
biaojie | 0 | 51,886,630,002 | 100% | ||
literal | 0 | 59,274,287,303 | 100% | ||
boblazar | 0 | 3,076,509,688 | 100% | ||
lifeisajourney | 0 | 802,424,207 | 72% | ||
dbfbfutures | 0 | 16,600,749,509 | 100% | ||
ifhy | 0 | 1,353,202,249 | 25% | ||
macaem | 0 | 3,748,500,335 | 100% | ||
dusty.sparks | 0 | 1,115,642,392 | 100% | ||
evergreen.min | 0 | 2,763,797,902 | 100% | ||
fee-service-new | 0 | 7,086,198,500 | 100% | ||
kamikazce87 | 0 | 21,094,446,961 | 100% |
!LOL
author | gameexp |
---|---|
permlink | re-oflyhigh-sash8p |
category | hive-105017 |
json_metadata | {"tags":["hive-105017"],"app":"peakd/2024.3.5"} |
created | 2024-03-23 07:10:00 |
last_update | 2024-03-23 07:10:00 |
depth | 1 |
children | 1 |
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cashout_time | 1969-12-31 23:59:59 |
total_payout_value | 0.000 HBD |
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pending_payout_value | 0.000 HBD |
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author_reputation | 56,187,353,770,012 |
root_title | "温故而知新:使用mysqldump备份WordPress MySQL数据库" |
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<div class='pull-right'><center><img src="https://lolztoken.com/lolz.png"><br><a href="https://lolztoken.com">lolztoken.com</a></p><br><br><br><br></center></div><p><center><strong>What do you call a hippo who says something and does the complete opposite?<br>A hippocrite</strong><br><sub>Credit: <a href="https://peakd.com/@reddit">reddit</a></sub><br>@oflyhigh, I sent you an <a href="https://lolztoken.com">$LOLZ</a> on behalf of gameexp<br><br>(8/10)<br>Farm <strong><a href='https://lolztoken.com'>LOLZ tokens</a></strong> when you <strong><a href='https://peakd.com/hive-155986/@lolztoken/earn-10percent-apr-on-hive-power-delegations-to-the-lolz-project'>Delegate Hive</a> or <a href='https://peakd.com/hive-155986/@lolztoken/introducing-lolz-defi-now-you'>Hive Tokens</a>.</strong><br>Click to delegate: <a href='https://hivesigner.com/sign/delegateVestingShares?delegator=&delegatee=lolzbot&vesting_shares=10%20HP'>10</a> - <a href='https://hivesigner.com/sign/delegateVestingShares?delegator=&delegatee=lolzbot&vesting_shares=20%20HP'>20</a> - <a href='https://hivesigner.com/sign/delegateVestingShares?delegator=&delegatee=lolzbot&vesting_shares=50%20HP'>50</a> - <a href='https://hivesigner.com/sign/delegateVestingShares?delegator=&delegatee=lolzbot&vesting_shares=100%20HP'>100</a> HP</center></p>
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虽然我对此一窍不通,半夜看到O神的文章,我决定还是留下足迹🤣🤣证明我还没睡~!~
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O哥这篇文章能发出来,我猜大概率一切顺利。😂😂😂 我想起一句话,人生不是为自己挖坑就是在为自己挖坑的路上。哈哈哈
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不为无益之事,何以遣有涯之生
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O哥所言甚是,我们做的绝大多数事情都是无聊之事,做的越多正可说明我们越快乐。😂
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👍👍
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技术哥上线 无与匹敌😁
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