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SSH免密码登陆教程 - 环境配置 - 清泛IT社区，为创新赋能！
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2、ssh-keygen -t [rsa|dsa]，将会生成密钥文件和私钥文件 id_rsa,id_rsa.pub或id_dsa,id_dsa.pub
3、将 .pub 文件复制到B机器的 .ssh 目录， 并 cat id_dsa.pub >> ~/.ssh/authorized_keys
4、大功告成，从A机器登录B机器的目标账户，不再需要密码了s...
Deleting all records in a database table
...elete_all.
Post.delete_all
or with a criteria
Post.delete_all "person_id = 5 AND (category = 'Something' OR category = 'Else')"
See here for more information.
The records are deleted without loading them first which makes it very fast but will break functionality like counter cache that depe...
Using the field of an object as a generic Dictionary key
...e objects as the keys for a Dictionary , what methods will I need to override to make them compare in a specific way?
5 An...
Express next function, what is it really for?
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next() with no arguments says "just kidding, I don't actual want to handle this". It goes back in and tries to find the next route that would match.
This is useful, say if you want to have some kind of page manager with url slugs, as well as lots of other thing...
POST Content-Length exceeds the limit
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The restart did it for me. +1 Thanks ;)
– Refilon
Mar 28 '16 at 11:01
1
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How do I store data in local storage using Angularjs?
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@Anton mozilla has solid documentation: developer.mozilla.org/en-US/docs/Web/HTML developer.mozilla.org/en-US/docs/Web/CSS/CSS3 developer.mozilla.org/en-US/docs/Web/JavaScript
– Guillaume Massé
Apr 3 '14 at ...
MySQL “between” clause not inclusive?
...nce by using >= and < instead of between.
– David Harkness
Mar 20 '12 at 0:42
113
You will ...
Easiest way to rename a model using Django/South?
...rename_foo_to_bar --empty
(Update 2: try --auto instead of --empty to avoid the warning below. Thanks to @KFB for the tip.)
If you're using an older version of south, you'll need startmigration instead of schemamigration.
Then manually edit the migration file to look like this:
class Migration...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
...设置为 innodb_file_per_table = 1。
参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html
1、找回表结构，如果表结构没有丢失直接到下一步
a、先创建一个数据库，这个数据库必须是没有表和任何操作的。
b、创建一个表结构，和要恢...
Rake just one migration
...and on what Ryan says, if the table has been dropped from the database outside of Rails, rake db:migrate:up VERSION=my_version may do nothing, because the schema_migrations table still says it is has been run. In the same situation rake db:migrate:redo VERSION=my_version may fail because it cannot d...