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The original was posted on /r/openssl by /u/mfaridi1978 on 2023-04-04 13:34:00+00:00.

I run this command on Fedora server

sudo openssl req -out tls.crt -new -keyout tls.key -newkey rsa:4096 -nodes -sha256 -x509 -subj "/O=HashiCorp/CN=Vault" -addext "subjectAltName =IP:127.0.0.1,IP:192.168.56.70,DNS:core" -days 3650

and this command generate tls.key and tls.crt for me

but when I run this command on oracle Linux

sudo openssl req -out tls.crt -new -keyout tls.key -newkey rsa:4096 -nodes -sha256 -x509 -subj "/O=HashiCorp/CN=Vault" -addext "subjectAltName =IP:127.0.0.1,IP:192.168.56.70,DNS:uid_core" -days 3650

I see this error

unknown option -addext
req [options] <infile >outfile
where options  are
 -inform arg    input format - DER or PEM
 -outform arg   output format - DER or PEM
 -in arg        input file
 -out arg       output file
 -text          text form of request
 -pubkey        output public key
 -noout         do not output REQ
 -verify        verify signature on REQ
 -modulus       RSA modulus

and can not make key