I am trying to change the Beaglebone black splash screen.
I am using Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.12-beaglebone-2013.06.20.img.xz image.
I compiled the psplash source (as explained in https://groups.google.com/forum/#!msg/beagleboard/HRDjAtsPO68/dc7gIZTynQkJ) and now psplash works fine.
In order to automatically start psplash I create a new system service called psplash.service and I enabled it with the command "systemctl enable psplash.service".
The problem is: when Beaglebone boots, the psplash is launched a little bit late and you can see for several
seconds the standard beaglebone logo. How can I configure the service in order to run the psplash as soon as possible ?
Is there a better way than the system services for starting psplash program ?
Here is the system service file:
[Unit]
Description=Splash screen
[Service]
WorkingDirectory=/home/root/
ExecStart=/usr/local/bin/psplash
SyslogIdentifier=psplash
[Install]
WantedBy=multi-user.target
Systemd services by default have dependencies so removing the dependencies will allow it to start the service early.
[Unit]
Description=Splash screen
DefaultDependencies=no
[Service]
Type=oneshot
ExecStart=/usr/local/bin/psplash
[Install]
WantedBy=basic.target
This will cause it to start before other dependencies. You may add dependencies within the [Unit] block with After=... or Before=.... But be careful with the Before=... as it will wait for psplash to end and since psplash will run uninterrupted on its own it may cause start-up to hang.
This will cause the service to run earlier in the systemd process but I am still looking into other ways to get it to start even earlier.
Related
I successfully implemented this, which blocks all internet connections on my Linux machine UNLESS it connects via a specific VPN :
https://www.comparitech.com/blog/vpn-privacy/how-to-make-a-vpn-kill-switch-in-linux-with-ufw/
If I manually execute openvpn3 session-start --config ~/Desktop/config.ovpn, it successfully connects via the VPN.
I used to have this command in a script (that has #!/bin/bash as header) which ran at device bootup without any issues, UNTIL I configured ufw for the killswitch above (now ufw runs on device bootup).
I use openvpn3 so using instructions in the above tutorial for openvpn commands didn't work at all.
I even tried using a sleep in my bash script to get it to wait a while until after bootup. Doesn't work. But if I issue the connection command manually in the command prompt, it works.
Please help! I need it to connect automatically. Much appreciated!
After spending a whole day on this, I figured out a solution. I found an article that guided me : https://www.howtogeek.com/687970/how-to-run-a-linux-program-at-startup-with-systemd/
I set up a service item using systemd (systemctl) just for that command to connect. Here is what my entry looks like :
#/etc/systemd/system/connectvpn.service
[Unit]
Description=Connect VPN
After=ufw.service network.target
Requires=ufw.service
[Service]
Type=oneshot
ExecStart=/usr/local/bin/connect
#/usr/local/bin/connect
#!/bin/bash
openvpn3 session-start --config /home/xyz/Desktop/config.ovpn
Working nicely now, connects to the VPN on bootup.
I want to run service with cap_net_raw capabilities but with no any interaction with filesystem and/or other processes. My program will use raw sockets and normal sockets (for API), stdout/err for logging and that's all.
I want to write systemd.service file to do this, but I couldn't produce a proper combination for DynamicUser, User and CapabilityBoundingSet.
My (non-working) unit looks like this:
[Unit]
Description=my daemon (%I)
ConditionFileNotEmpty=/etc/daemon/%i.conf
Wants=network-online.target
BindsTo=daemon.target
[Service]
Type=simple
WorkingDirectory=/etc/daemon
EnvironmentFile=/etc/daemon/%i.conf
ExecStart=/usr/bin/daemon ${OPTIONS}
CapabilityBoundingSet=CAP_NET_RAW
ProtectSystem=true
ProtectHome=true
RestartSec=5s
Restart=on-failure
User=daemon-%i
Group=nobody
DynamicUser=true
[Install]
WantedBy=daemon.target
How can I configure dynamic user 'nobody' together with CAP_NET_RAW?
You also need:
AmbientCapabilities=CAP_NET_RAW
See this question about the difference between AmbientCapabilities and CapabilityBoundingSet, as well as the documentation.
I need to run some services on boot up which I have successfully accomplished using systemd services. (Lots of answers already available).
Now, one of my service requires access to /dev/video0 while bootup when a certain user is logged in. (I am doing auto login which is working fine).
So how do I check that whether the /dev/video0 is available before starting my systemd service while bootup.
I came across something called udev for doing this, I followed this link
but I am not getting desired output as after editing /lib/udev/rules.d/99-systemd.rules files as mentioned in the link and starting my service manually it's not starting, any help is appreciated.
Finally after struggling for a day I found the answer -
I made a script in /etc/systemd/system which contains
[Unit]
Description='some description of my file write according to you'
[Service]
Type=forking
ExecStart='path to script'
[Install]
WantedBy=multi-user.target
and It executes a script which contains
#!/bin/bash
modprobe uvcvideo
Now after rebooting all the services are running properly
mod probe uvcvideo command check for running video driver and enable it at the time of bootup so that It is available for my systemd process
Thanks
I'm just trying to do a POC test with Telium's HAAst before we offer it to a customer, but I've stalled before I start the haast daemon. Currently I have a single VM with Ubuntu 16.04 LTS with Digium's basic Asterisk 13 installation. I've configured haast.conf, it seems good, but I cannot start haast daemon, it stops after a few seconds. Here is the relevant log output:
General, HAAst version 2.3.2.1 starting as daemon under process ID 2409
Controller, Local peer HAAst state changing to service start
License, License file not found. Switching to Free Edition
General, Settings contained 0 information; 0 warning; and 0 error messages.
Asterisk Controller, Unable to located executable to control Asterisk
Controller, Local peer HAAst state changing to service stop
Controller, Stopped
General, HAAst terminating with exit code 158 (failure to find asterisk control files) after running for 2 seconds
It seems, haast misses the event controller to start Asterisk daemon, unfortunately it didn't contain the installation package. I've tried to make these files (asterisk.start & asterisk.stop) based on the other sample event files, I've set the executable bit, I've wrote the shebang to the first line based on the installation guide, but nothing helped.
Is somebody experienced about this case?
Thanks, Zsolt
This error means that High Availability for Asterisk (HAAst) is unable to find the service/executable file needed to control Asterisk. Since the 'distribution' setting in the [asterisk] stanza of the haast.conf file is it to 2 (Digium Asterisk), it means there's a problem with the Asterisk service file.
Ubuntu 16 uses systemd so have you installed Digium's asterisk.service (systemd) file? If you chose to install an initd service file for Asterisk instead then you may have to explicitly tell HAAst which to look for. If you installed neither then that's your problem. The maker of HAAst (Telium) has a support forum where this topic is addressed (click here).
The pre and post Asterisk event handlers are available in the commercial versions of HAAst only - so that won't help (but it's also the wrong way to solve the problem). There are also a few Ubuntu specific topics on the support forum https://www.telium.io/haast in case that helps.
If you can't find an Asterisk systemd service file here's a sample:
[Unit]
Description=Asterisk PBX and telephony daemon
Documentation=man:asterisk(8)
Wants=network.target
After=network.target
[Service]
Type=simple
User=asterisk
Group=asterisk
ExecStart=/usr/bin/asterisk -f -C /etc/asterisk/asterisk.conf
ExecStop=/usr/bin/asterisk -rx 'core stop now'
ExecReload=/usr/bin/asterisk -rx 'core reload'
[Install]
WantedBy=multi-user.target
Just save that file as 'asterisk.service' and place in /etc/systemd/system/ and ensure permissions match other service/unit files.
Haast configuration is missing or not correct:
Unable to located executable to control Asterisk
What is the proper way to run Kibana 4.5 as service on CentOS 7?
When I run it as ./kibana, I can conenct to it form another machine without any problem. When I run it with systemctl start kibana and check with ps -ef | grep '.*node/bin/node.*src/cli'it looks like running but refuses to connect. And goes down. What can be the problem? Thanks in advance.
Here is content of kibana.service file
[Unit]
Description=no description given
[Service]
Type=simple
User=kibana
Group=root
Environment=CONFIG_PATH=/opt/kibana/config/kibana.yml
ExecStart=/opt/kibana/bin/kibana
Restart=always
[Install]
WantedBy=multi-user.target
I am not that much of a linux expert but i recently installed kibana using yum (https://www.elastic.co/guide/en/kibana/4.5/setup.html#kibana-yum) on a minimal installation of CentOS 7 and did not face any issues whatsoever.
In order to have some debug logs and find out what is wrong in your case, edit the kibana configurations file
/opt/kibana/config/kibana.yml
and set a filename for the logging.dest property.
logging.dest: /var/log/kibana.log
Good luck
Igor,
I noticed a few questions you posted on Kafka so sounds like you need to set up a cluster that can ingest data and pass to Elastic. Kibana would be just user interface.
In my experience, components like ELK, Kafka, Zookeeper, etc should be managed by a watchdog process. I highly recommend looking at something like supervisord. http://supervisord.org/
You should run it as a service and the rest managed by the supervisor. It will guarantee starting components at boot but whats more important restart in case of failure and collecting logs. In case of Kibana, it is a NodeJS app that writes to stdout/stderr so to know what fails, you need to collect them.