SSH with no password and SSH tunneling

Option 1: SSH without needing your password

1 ) You are A. You want to SSH to B.

2) Generate SSH keys on A. *Don’t* type a password, leave blank when prompted.

a@A:~> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/a/.ssh/id_rsa):
Created directory '/home/a/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/a/.ssh/id_rsa.
Your public key has been saved in /home/a/.ssh/id_rsa.pub.
The key fingerprint is:
3e:4f:05:79:3a:9f:96:7c:3b:ad:e9:58:37:bc:37:e4 a@A

3) Create a directory ~/.ssh as user b on B if one doesn’t exist.

a@A:~> ssh b@B mkdir -p ~/.ssh
b@B's password:

4) Append a’s new public key to b@B:.ssh/authorized_keys and enter b’s password one last time:

a@A:~> cat ~/.ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:

5) Now you need no password.

a@A:~> ssh b@B hostname

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Option 2: SSH without needing your password

$ ssh-agent bash
$ ssh-add ~/.ssh/id_rsa
$ ssh username@remote

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Tunnelling through multiple logins is really easy but you have to do the above for all the hosts that you want to automatically hop over.

Sort out your intermediate hosts so you can auto-ssh into them as above. Then run:

$ ssh -t user@intermediateserver.com ssh user@finaldestination.com

 

OpenCL Error Codes

Hope this helps. Straight from the header file:

/* Error Codes */

#define CL_SUCCESS 0
#define CL_DEVICE_NOT_FOUND -1
#define CL_DEVICE_NOT_AVAILABLE -2
#define CL_COMPILER_NOT_AVAILABLE -3
#define CL_MEM_OBJECT_ALLOCATION_FAILURE -4
#define CL_OUT_OF_RESOURCES -5
#define CL_OUT_OF_HOST_MEMORY -6
#define CL_PROFILING_INFO_NOT_AVAILABLE -7
#define CL_MEM_COPY_OVERLAP -8
#define CL_IMAGE_FORMAT_MISMATCH -9
#define CL_IMAGE_FORMAT_NOT_SUPPORTED -10
#define CL_BUILD_PROGRAM_FAILURE -11
#define CL_MAP_FAILURE -12

#define CL_INVALID_VALUE -30
#define CL_INVALID_DEVICE_TYPE -31
#define CL_INVALID_PLATFORM -32
#define CL_INVALID_DEVICE -33
#define CL_INVALID_CONTEXT -34
#define CL_INVALID_QUEUE_PROPERTIES -35
#define CL_INVALID_COMMAND_QUEUE -36
#define CL_INVALID_HOST_PTR -37
#define CL_INVALID_MEM_OBJECT -38
#define CL_INVALID_IMAGE_FORMAT_DESCRIPTOR -39
#define CL_INVALID_IMAGE_SIZE -40
#define CL_INVALID_SAMPLER -41
#define CL_INVALID_BINARY -42
#define CL_INVALID_BUILD_OPTIONS -43
#define CL_INVALID_PROGRAM -44
#define CL_INVALID_PROGRAM_EXECUTABLE -45
#define CL_INVALID_KERNEL_NAME -46
#define CL_INVALID_KERNEL_DEFINITION -47
#define CL_INVALID_KERNEL -48
#define CL_INVALID_ARG_INDEX -49
#define CL_INVALID_ARG_VALUE -50
#define CL_INVALID_ARG_SIZE -51
#define CL_INVALID_KERNEL_ARGS -52
#define CL_INVALID_WORK_DIMENSION -53
#define CL_INVALID_WORK_GROUP_SIZE -54
#define CL_INVALID_WORK_ITEM_SIZE -55
#define CL_INVALID_GLOBAL_OFFSET -56
#define CL_INVALID_EVENT_WAIT_LIST -57
#define CL_INVALID_EVENT -58
#define CL_INVALID_OPERATION -59
#define CL_INVALID_GL_OBJECT -60
#define CL_INVALID_BUFFER_SIZE -61
#define CL_INVALID_MIP_LEVEL -62
#define CL_INVALID_GLOBAL_WORK_SIZE -63