telnet vs netcat

Scotty Moe

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This article aims to provide guidance on executing the ‘set’ command in memcached using netcat/telnet.

The focus is on addressing the issue faced by a user who encountered an error message, specifically ‘memcachedCLIENT_ERROR bad data chunk’, while attempting to run the command.

The user attempted to use the command ‘nc localhost 11211 set tutorialspoint 0 900 9’, which is commonly mentioned in tutorials and Golang client source code.

Notably, the user is running memcached version 1.6.19 on an arm MacBook.

A potential cause of the issue could be the line endings on Mac, which employ LF.

In their search for a solution, the user stumbled upon a suggestion on Superuser involving the use of control-v and control-m.

With the intention of providing an answer on Stack Overflow, the user is advised to incorporate relevant details and research in their response.

Executing ‘set’ command

One aspect of executing the ‘set’ command in memcached via netcat/telnet that has been encountered is the difficulty and error message received. Specifically, the ‘memcachedCLIENT_ERROR bad data chunk’ error indicates that there is a problem with the data being sent to the memcached server.

It is important to note that the ‘set’ command requires specific parameters to be passed in order to store a value in memcached. These parameters include the key, flags, expiration time, and length of the value.

It is possible that the error is occurring due to incorrect formatting or missing parameters in the command. Additionally, it is worth considering any potential issues with line endings on the Mac system, as this can sometimes cause problems when interacting with memcached via netcat/telnet.

To resolve this issue, it may be helpful to follow the solution found in a Superuser answer. This solution involves using control-v and control-m to properly handle line endings.

Error message and solution

The error message ‘memcachedCLIENT_ERROR bad data chunk’ indicates a problem with the data chunk being sent. This error typically occurs when there are issues with line endings on Mac, which uses LF (Line Feed) as opposed to CRLF (Carriage Return Line Feed) used by Windows.

To resolve this issue, a solution found in a Superuser answer involves the use of control-v and control-m for addressing line ending issues. By using control-v and control-m, the user can insert the correct line ending characters and ensure that the data chunk is formatted correctly before sending it to the memcached server.

This solution has been found to work for running the ‘set’ command in memcached via netcat/telnet, allowing the user to successfully store data in the cache.

Answering on Stack Overflow

To provide a thorough response on Stack Overflow, it is essential to address the current subtopic of answering queries related to memcached issues with precision and factual information.

When answering a question on Stack Overflow, it is important to consider the specific problem faced by the user and provide a detailed solution.

In the case of executing the ‘set’ command in memcached via netcat/telnet, it is crucial to understand the error message and its possible causes.

Explaining the solution found in a Superuser answer, which involves using control-v and control-m to handle line endings on Mac, can be helpful.

Additionally, providing alternative approaches or suggesting further troubleshooting steps can enhance the answer.

It is important to present the information clearly and concisely, ensuring that it is easy for the user to comprehend and implement.

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