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ssh: The authenticity of host 'hostname' can't be established
When i ssh to a machine, sometime i get this error warning and it prompts to say "yes" or "no". This cause some trouble when running from scripts that automatically ssh to other machines.
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How to create a self-signed certificate with OpenSSL
...embedded Linux device. I have tried to generate a self-signed certificate with these steps:
15 Answers
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With CSS, use “…” for overflowed block of multi-lines
with
16 Answers
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When to use EntityManager.find() vs EntityManager.getReference() with JPA
I have come across a situation (which I think is weird but is possibly quite normal) where I use the EntityManager.getReference(LObj.getClass(), LObj.getId()) to get a database entity and then pass the returned object to be persisted in another table.
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
I am curious if anyone has any information about the scalability of HTML WebSockets. For everything I've read it appears that every client will maintain an open line of communication with the server. I'm just wondering how that scales and how many open WebSocket connections a server can handle. Mayb...
Is it a bad practice to catch Throwable?
Is it a bad practice to catch Throwable ?
14 Answers
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Rails: FATAL - Peer authentication failed for user (PG::Error)
... on your server then just host: localhost to database.yml, I usually throw it in around where it says pool: 5. Otherwise if it's not localhost definitely tell that app where to find its database.
development:
adapter: postgresql
encoding: unicode
database: kickrstack_development
host: loca...
Can I catch multiple Java exceptions in the same catch clause?
...tch both ExceptionA and ExceptionB in the same block if ExceptionB is inherited, either directly or indirectly, from ExceptionA. The compiler will complain:
Alternatives in a multi-catch statement cannot be related by subclassing
Alternative ExceptionB is a subclass of alternative ExceptionA
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Why shouldn't all functions be async by default?
The async-await pattern of .net 4.5 is paradigm changing. It's almost too good to be true.
4 Answers
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Change project name on Android Studio
...as shown in the image below.
In the first rectangle I want to change it in:
31 Answers
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