Systemd

Journal

Systemd keeps tracks of service logs.

Clearing Journal

Clear all the entries by running:

# journalctl --vacuum-time=1seconds

SystemV-like Init Scripts

If you have custom packages that make use of the old SystemV startup scripts, you can use the following files to make use of such scripts.

In /usr/lib/systemd/system/startup.service

[Unit]
Description=Custom SystemV-like Startup
After=network.target
ConditionFileIsExecutable=/usr/local/sbin/custom-startup-initd

[Service]
Type=oneshot
ExecStart=/usr/local/sbin/custom-startup-initd
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes
SysVStartPriority=99

[Install]
WantedBy=multi-user.target

A few things of interest.

• The ConditionFileIsExecutable will only run the script if it's executable. It basically does a test -x on the file before this continues.
• RemainAfterExit will cause systemd to show the service as active even after the script has finished execution.

In /usr/local/sbin/custom-startup-initd:

#!/bin/sh
StartupDir="/usr/local/boot/startup"

# Run all scripts starting with 'S'
for i in `ls $StartupDir/S*` ; do
        ScriptName=`basename $i`
        sh $StartupDir/$ScriptName
done

# Success exit code.
exit 0

Make the directory:

# mkdir -p /usr/local/boot/startup/

Then place your scripts in the startup directory starting with the letter 'S'.

Enable the new service by running:

# systemctl enable startup
# systemctl start startup

Verify this:

# systemctl status startup.service