Solve Linux error while loading shared libraries: cannot open shared object file: No such file or directory, errorwhileloading

Solve Linux error while loading shared libraries: cannot open shared object file: No such file or directory, errorwhileloading

To install the latest Emqtt version, follow the instructions in the official documentation to report the following error:

Linux error while loading shared libraries libsctp. so.1: cannot open shared object file: No such file or directory

 

I have found some articles on the Internet to solve my problems. I will post them here. You can refer to these articles to solve similar problems.

 

1. Search for the file locally

Command: wheris libsctp. so.1

First, check whether a local file exists. If yes, skip to Step 3. I cannot find the result here.

 

2. Download libsctp from google.

This website has a lot of so file downloads: https://www.rpmfind.net/

Https://www.rpmfind.net/linux/RPM/centos/6.8/x86_64/Packages/lksctp-tools-1.0.10-7.el6.i686.html

 

RPM installation, refer

Http://www.centoscn.com/CentOS/help/2013/1019/1906.html

 

Wheris libsctp. so.1 after installation

It was found that it was installed under usr/lib.

Run./bin/emqttd consystemic again, or an error is returned.

 

3. It is suspected that it is an environment variable LD_LIBRARY_PATH.

The system does not know which directory xxx. so is stored. In this case, add the directory xxx. so to/etc/ld. so. conf.

In general, there are a lot of so files stored in the directory/usr/local/lib. Find them under this directory and find the. so file you need.

Therefore, add the/usr/local/lib line to/etc/ld. so. conf, save the line, and then run:/sbin/ldconfig-v to update the configuration.

In my case, after rpm, the so file is installed in/usr/lib, and this directory does not need to be configured.

You can refer:

Http://blog.csdn.net/sahusoft/article/details/7388617

Here, an error is returned after/sbin/ldconfig is updated. However, the error message has changed:

Wrong ELF class: ELFCLASS32

 

4. After the query, it should be 32-bit or 64-bit. The Emqttd I installed is a 64-bit version.

Use commands

File/usr/lib64/libsctp. so.1 is found to be a link to 'libsctp. so.1.0.17'

File/usr/lib64/libsctp. so.1.0.17 is found to be a 32-bit file.

It seems that 64-bit Emqtt cannot use 32-bit so files.

 

5. re-install the 64-bit version of google libsctp with rpm. Before installation, run rpm-e to uninstall the original 32-bit version.

After 64-bit installation, ldconfig. Run again. The emqtt service is successfully enabled and the problem is solved.