To Nha Notes | Sept. 13, 2023, 10:39 p.m.
Basically, below packages are not installed in Amazon Linux 2023
If rsyslog is not installed, below logs would not be generated
In AL2023 the logging system package has changed from Amazon Linux 2. AL2023 doesn't install rsyslog by default, so the text based log files such as /var/log/messages that were available in Amazon Linux 2 aren't available by default. The default configuration for AL2023 is systemd-journal, which can be examined using journalctl. Although rsyslog is an optional package in AL2023, we recommend the new systemd based journalctl interface and related packages. For more information, see the journalctl manual page.
List up services in Amazon Linux 2023
ls -l /etc/systemd/system
Add new service in Amazon Linux 2023
sudo tee /etc/systemd/system/echo-test.service << EOF > /dev/null [Unit] Description=echo test [Service] User=ec2-user Group=ec2-user Type=oneshot ExecStart=/usr/bin/echo test [Install] WantedBy=multi-user.target EOF
List up active packages in Amazon Linux 2023
sudo systemctl list-units --type=service | awk '$1 ~ /service$/ {printf "%-50s %7s\n",$1, $3}'
acpid.service active
amazon-cloudwatch-agent.service active
amazon-ssm-agent.service active
atd.service active
auditd.service active
chronyd.service active
cloud-config.service active
cloud-final.service active
cloud-init-local.service active
cloud-init.service active
crond.service active
dbus-broker.service active
dracut-shutdown.service active
getty@tty1.service active
gssproxy.service active
irqbalance.service active
jupyter.service active
kmod-static-nodes.service active
libstoragemgmt.service active
nginx.service active
policy-routes@ens5.service active
psacct.service active
refresh-policy-routes@ens5.service activating
rngd.service active
rpc-statd-notify.service active
serial-getty@ttyS0.service active
sshd.service active
sssd.service active
sysstat.service active
systemd-fsck-root.service active
systemd-fsck@dev-disk-by\x2duuid-BF44\x2d0AE6.service active
systemd-homed-activate.service active
systemd-homed.service active
systemd-journal-catalog-update.service active
systemd-journal-flush.service active
systemd-journald.service active
systemd-logind.service active
systemd-machine-id-commit.service active
systemd-network-generator.service active
systemd-networkd-wait-online.service active
systemd-networkd.service active
systemd-random-seed.service active
systemd-remount-fs.service active
systemd-resolved.service active
systemd-sysctl.service active
systemd-tmpfiles-setup-dev.service active
systemd-tmpfiles-setup.service active
systemd-udev-trigger.service active
systemd-udevd.service active
systemd-update-done.service active
systemd-update-utmp.service active
systemd-user-sessions.service active
systemd-userdbd.service active
user-runtime-dir@0.service active
user@0.service
List up inactive services in Amazon LInux 2023 active
systemctl list-units --type=service --state=inactive | awk '$1 ~ /service$/ {printf "%-50s %7s\n",$1, $3}'
auth-rpcgss-module.service inactive
chrony-config.service inactive
dracut-cmdline.service inactive
dracut-initqueue.service inactive
dracut-mount.service inactive
dracut-pre-mount.service inactive
dracut-pre-pivot.service inactive
dracut-pre-trigger.service inactive
dracut-pre-udev.service inactive
emergency.service inactive
fstrim.service inactive
hibinit-agent.service inactive
import-state.service inactive
initrd-cleanup.service inactive
initrd-parse-etc.service inactive
initrd-switch-root.service inactive
initrd-udevadm-cleanup-db.service inactive
ldconfig.service inactive
logrotate.service inactive
modprobe@configfs.service inactive
modprobe@drm.service inactive
modprobe@efi_pstore.service inactive
modprobe@fuse.service inactive
nfs-blkmap.service inactive
nfs-convert.service inactive
nfs-idmapd.service inactive
nfs-mountd.service inactive
nfs-server.service inactive
nfs-utils.service inactive
nfsdcld.service inactive
rc-local.service inactive
refresh-policy-routes@ens5.service inactive
rescue.service inactive
rpc-gssd.service inactive
rpc-statd.service inactive
rpcbind.service inactive
rpmdb-rebuild.service inactive
selinux-autorelabel-mark.service inactive
sshd-keygen@ecdsa.service inactive
sshd-keygen@ed25519.service inactive
sshd-keygen@rsa.service inactive
sssd-kcm.service inactive
sysstat-collect.service inactive
sysstat-summary.service inactive
systemd-ask-password-console.service inactive
systemd-ask-password-wall.service inactive
systemd-binfmt.service inactive
systemd-firstboot.service inactive
systemd-hwdb-update.service inactive
systemd-initctl.service inactive
systemd-modules-load.service inactive
systemd-pstore.service inactive
systemd-quotacheck.service inactive
systemd-repart.service inactive
systemd-sysusers.service inactive
systemd-timesyncd.service inactive
systemd-tmpfiles-clean.service inactive
systemd-udev-settle.service inactive
systemd-update-utmp-runlevel.service inactive
systemd-vconsole-setup.service inactive
update-motd.service inactive
https://docs.aws.amazon.com/linux/al2023/release-notes/relnotes.html
https://docs.aws.amazon.com/linux/al2023/release-notes/compare-packages.html
https://docs.aws.amazon.com/linux/al2023/release-notes/all-packages-AL2023.1.html
https://docs.aws.amazon.com/linux/al2023/ug/compare-with-al2.html
https://dev.classmethod.jp/articles/diff-al-2023-and-al-2-packages-and-services/
https://docs.aws.amazon.com/linux/al2023/release-notes/removed-AL2023.1-AL1.html
https://docs.aws.amazon.com/linux/al2023/release-notes/removed-AL2023.1-AL2.html
https://linuxhandbook.com/journalctl-command/
https://www.geeksforgeeks.org/journalctl-command-in-linux-with-examples/
https://linuxconfig.org/journalctl-command-usage-and-examples-on-linux
https://www.freedesktop.org/software/systemd/man/journalctl.html