The /var/log/dmesg file is not created during boot for Red Hat Enterprise Linux 8

The /var/log/dmesg file is not created during boot for Red Hat Enterprise Linux 8

https://access.redhat.com/solutions/3748981

环境

• Red Hat Enterprise Linux 8

问题

• On boot, there is no /var/log/dmesg file after install RHEL8.
• I can get dmesg file via command dmesg, is this new design for RHEL 8, or do I need to modify some configuration to generate it automatically?

决议

Re-enabling the /var/log/dmesg log file

1) Create a /etc/systemd/system/dmesg.service configuration file with the following contents

Raw

[Unit]
Description=Create /var/log/dmesg on boot
ConditionPathExists=/var/log/dmesg

[Service]
ExecStart=/usr/bin/dmesg
StandardOutput=file:/var/log/dmesg

[Install]
WantedBy=multi-user.target

2) Create the /var/log/dmesg file and verify SELinux contexts

Raw

# touch /var/log/dmesg
# restorecon -v /var/log/dmesg

3) Enable the service to start on boot

Raw

# systemctl enable dmesg