Linux Tricks: Difference between revisions

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  ResultInactive=no
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=== Creating service in systemd (RHEL7 and up) ===
'''DiagGuiServer example'''
Create file ''/usr/lib/systemd/system/DiagGuiServer.service'' with following contents:
[Unit]
Description=DiagGuiServer
#After=network.target
After=network.target apps.mount home.mount usr-clas12.mount usr-local.mount
[Service]
Type=simple
#RestartSec=10
User=clasrun
Group=onliners
#EnvironmentFile=/home/clasrun/systemdenv
#ExecStart=/usr/clas12/release/1.4.0/coda/src/rol/Linux_x86_64/bin/DiagGuiServer
ExecStart=/usr/clas12/release/1.4.0/coda/Linux_x86_64/bin/DiagGuiServer init
[Install]
#WantedBy=multi-user.target
WantedBy=default.target
Create symbolic link:
ln -s /usr/lib/systemd/system/DiagGuiServer.service /etc/systemd/system/DiagGuiServer.service
Create directory ''/etc/systemd/system/DiagGuiServer.service.d/''
Create file ''/etc/systemd/system/DiagGuiServer.service.d/override.conf'' with following contents:
[Service]
Environment="LD_LIBRARY_PATH=/apps/gcc/8.3.0/lib:/apps/gcc/8.3.0/lib64:/usr/lib:/usr/local/lib:/usr/local/activemq/lib:/usr/clas12/release/1.4.0/coda/Linux_x86_64/lib:/usr/clas12/release/1.4.0/clon/Linux_x86_64/lib:/usr/clas12/release/1.4.0/clon/lib"
Environment="IPC_HOST=clon00"
Environment="MYSQL_HOST=clondb1"
Environment="EXPID=clasrun"
Environment="CLON_PARMS=/usr/clas12/release/1.4.0/parms"
Following commands can be used to control service:
systemctl start DiagGuiServer
systemctl stop DiagGuiServer
systemctl status DiagGuiServer
To start service at boot time, execute command:
systemctl enable DiagGuiServer
following message should come up on screen:
Created symlink from /etc/systemd/system/default.target.wants/DiagGuiServer.service to /usr/lib/systemd/system/DiagGuiServer.service.

Latest revision as of 10:55, 14 April 2025

Color change when connected remotely

Problem: after opening vnc session to linux machine from macbook laptop, small window pops up asking about some color settings (create color profile etc), and keeps asking for password; none of passwords actually works, and it keeps asking again and again.

Fix: on linux machine, create file /etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla with permissions 644 and following contents:

[Allow Colord all Users]
Identity=unix-user:*
Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile
ResultAny=no
ResultInactive=no
ResultActive=yes