[root@almalinux almalinux]# hostnamectl
Static hostname: almalinux.local
Icon name: computer
Machine ID: xxxxxxxxxxxxxxxxx
Boot ID: xxxxxxxxxxxxxxxxx
Operating System: AlmaLinux 9.5 (Teal Serval)
CPE OS Name: cpe:/o:almalinux:almalinux:9::baseos
Kernel: Linux 6.6.31-20240529.v8.2.el9
Architecture: arm64
[root@almalinux almalinux]# hostnamectl set-hostname rpsv02
[root@almalinux almalinux]# hostname
rpsv02
[root@almalinux almalinux]# hostnamectl
Static hostname: rpsv02
Icon name: computer
Machine ID: xxxxxxxxxxxxxxxxx
Boot ID: xxxxxxxxxxxxxxxxx
Operating System: AlmaLinux 9.5 (Teal Serval)
CPE OS Name: cpe:/o:almalinux:almalinux:9::baseos
Kernel: Linux 6.6.31-20240529.v8.2.el9
Architecture: arm64
[root@almalinux almalinux]#
※再起動するとよい。