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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/var/lib/cloud has the following structure:
- scripts/
per-instance/
per-boot/
per-once/
files in these directories will be run by 'run-parts' once per
instance, once per boot, and once per *ever*.
- seed/
<datasource>/
sys-user-data
user-data
meta-data
The 'seed/' directory allows you to seed a specific datasource
For example, to seed the 'nocloud' datasource you would need to
populate
seed/nocloud/user-data
seed/nocloud/meta-data
- instance -> instances/i-abcde
This is a symlink to the current instance/<instance-id> directory
created/updated on boot
- instances/
i-abcdefgh/
scripts/ # all scripts in scripts are per-instance
sem/
config-puppet
config-ssh
set-hostname
cloud-config.txt
user-data.txt
user-data.txt.i
obj.pkl
handlers/
data/ # just a per-instance data location to be used
boot-finished
# this file indicates when "boot" is finished
# it is created by the 'final_message' cloud-config
datasource # a file containing the class and string of datasource
- sem/
scripts.once
These are the cloud-specific semaphores. The only thing that
would go here are files to mark that a "per-once" script
has run.
- handlers/
"persistent" handlers (not per-instance). Same as handlers
from user-data, just will be cross-instance id
- data/
this is a persistent data location. cloud-init won't really
use it, but something else (a handler or script could)
previous-datasource
previous-instance-id
previous-hostname
to clear out the current instance's data as if to force a "new run" on reboot
do:
( cd /var/lib/cloud/instance && sudo rm -Rf * )