Slackware 15.0 x86_64 を新規Installしてみました。こちらを参考にさせて頂きました。
root@Slackware:~# uname -r
5.15.19
root@Slackware:~# php -v
PHP 7.4.27 (cli) (built: Dec 16 2021 13:00:17) ( ZTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.27, Copyright (c), by Zend Technologies
root@Slackware:~# curl -V
curl 7.81.0 (x86_64-pc-linux-gnu) libcurl/7.81.0 OpenSSL/1.1.1m zlib/1.2.11 brotli/1.0.9 zstd/1.5.2 c-ares/1.18.1 libidn2/2.3.2 libpsl/0.21.1 (+libidn2/2.3.0) libssh2/1.10.0 nghttp2/1.46.0 OpenLDAP/2.4.59
Release-Date: 2022-01-05
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS brotli GSS-API HSTS HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM NTLM_WB PSL SPNEGO SSL TLS-SRP UnixSockets zstd
root@Slackware:~# samba -V
Version 4.15.5
root@Slackware:~# cat /etc/os-release
NAME=Slackware
VERSION=”15.0″
ID=slackware
VERSION_ID=15.0
PRETTY_NAME=”Slackware 15.0 x86_64″
ANSI_COLOR=”0;34″
CPE_NAME=”cpe:/o:slackware:slackware_linux:15.0″
HOME_URL=”http://slackware.com/”
SUPPORT_URL=”http://www.linuxquestions.org/questions/slackware-14/”
BUG_REPORT_URL=”http://www.linuxquestions.org/questions/slackware-14/”
VERSION_CODENAME=stable
root@Slackware:~#