kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ ls -l /etc/rsyslog.d/
total 16
-rw-r--r-- 1 root root  316 Sep 12 08:32 10-remote.conf
-rw-r--r-- 1 root root  314 May 16  2023 20-ufw.conf
-rw-r--r-- 1 root root  255 Jul 24 01:34 21-cloudinit.conf
-rw-r--r-- 1 root root 1124 Aug 22  2025 50-default.conf
kazulog@sv1:~$ cat /etc/rsyslog.d/10-remote.conf
# 送信元ホストごとにファイルを分ける
template(name="RemoteFile" type="string" string="/var/log/remote/%HOSTNAME%/messages.log")
ruleset(name="remote") {
    action(type="omfile" dynaFile="RemoteFile")
}
input(type="imudp" port="514" ruleset="remote")
input(type="imtcp" port="514" ruleset="remote")
kazulog@sv1:~$ sudo systemctl restart rsyslog