Error while creating self-signed SSL certificate

certificateopensslSecuritysslssl-certificate

I tried to create a self-signed certificate based on the instructions in the link in Security key and cert for mosca MQTT broker. 

$ openssl genrsa -des3 -out tls-key.pem 1024 (works fine)

$ openssl req -new -key tlk-key -out server.csr (returns error)

The error looks like this on cygwin;

Error opening Private Key tlk-key 6870300:error:02001002:system
library:fopen:No such file or
directory:bss_file.c:391:fopen('tlk-key','rb')
6870300:error:20074002:BIO routines:FILE_CTRL:system
lib:bss_file.c:393: unable to load Private Key

On Ubuntu 16.04, the error looks like this;

Error opening Private Key tlk-key
140137729443480:error:02001002:system library:fopen:No such file or
directory:bss_file.c:398:fopen('tlk-key','r')
140137729443480:error:20074002:BIO routines:FILE_CTRL:system
lib:bss_file.c:400: unable to load Private Key

I tried with cygwin and Ubuntu. Can anyone advise what went wrong?

EDIT:
I tried the command below after getting the answer from Steffen Ullrich. It still returns an error.

$ openssl req -new -key tlk-key.pem -out server.csr

Error opening Private Key tlk-key.pem 6870300:error:02001002:system
library:fopen:No such file or
directory:bss_file.c:391:fopen('tlk-key.pem','rb')
6870300:error:20074002:BIO routines:FILE_CTRL:system
lib:bss_file.c:393: unable to load Private Key

Best Answer

You create the key file tls-key.pem but then try to use the non-existing file tlk-key instead of the file you've created:

$ openssl genrsa -des3 -out tls-key.pem 1024 (works fine)
                            ^^^^^^^^^^^^
$ openssl req -new -key tlk-key -out server.csr (returns error)
                        ^^^^^^^
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