Szia!
Köszi a választ, de még mindig vannak problémák....
A leírásod alapján haladtam, mikor:
openssl ca -out newcert.pem -in newreq.pem -keyfile privateCA.pem -days 3650 -cert publicCA.crt -outdir ./
Using configuration from /etc/ssl/openssl.cnf
Enter pass phrase for privateCA.pem:
./demoCA/index.txt: No such file or directory
unable to open './demoCA/index.txt'
6154:error:02001002:system library:fopen:No such file or directory:bss_file.c:352:fopen('./demoCA/index.txt','r')
6154:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:354: