pacman : kde, gnome, xfce

To install:

# pacman -S kde

# pacman -S gnome

# pacman -S xfce4

To remove:

# pacman -Rnsc kde

# pacman -Rnsc gnome

# pacman -Rnsc xfce4

ArchLinux: kexec

# vim /etc/systemd/system/kexec-load@.service

[Unit]
Description=load %I kernel into the current kernel
Documentation=man:kexec(8)
DefaultDependencies=no
Before=shutdown.target umount.target final.target

[Service]
Type=oneshot
ExecStart=/sbin/kexec -l /boot/vmlinuz-%I --initrd=/boot/initramfs-%I.img --reuse-cmdline

[Install]
WantedBy=kexec.target

# systemctl enable kexec-load@linux

# systemctl kexec

frm