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Gryu
Asked: 2020-03-04 05:24:18 +0800 CST

How to show service notifications on the desktop

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I want to show sshd.service notifications on the desktop to know if someone is connected to my PC using ssh.

I could track changes by using terminal and running journalctl -t sshd -f, but it requires additional attention from me in case of opening terminal every time, running the command and tracking changes.

notification services 19.10

1 Answers

  1. I've tried it in the next way:

    • Check if I could see service logs in journalctl: journalctl -t sshd -f

    • Create new service that will run my journalctl command and output it using notifications on the desktop: sudo vim.tiny /etc/systemd/system/shownotes.service

      [Unit]
Description=Show notifications from service on the desktop
After=sshd.service

[Service]
Type=simple
ExecStart=/home/user/test/output.sh
WorkingDirectory=/home/user/test
StandardOutput=journal+console

[Install]
WantedBy=multi-user.target

    • Create script: vim.tiny /home/user/test/output.sh:

      #!/bin/bash
export DISPLAY=:0 && journalctl -t sshd -f > /dev/pts/0

      I use echo $DISPLAY to get display value. /dev/pts/0 - notifications output device. sshd - service, which syslog's output I will direct to DISPLAY=:0.

    • Start and enable new service: 

      sudo systemctl start shownotes && sudo systemctl enable shownotes

    The state of the new service in real time I could see by:

    journalctl -u shownotes -f

    Results:
    notifications image

    But after rebooting and entering into Gnome session, not Kubuntu/Plazma, it started showing notification on /dev/pts/2

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