If using a USB serial converter, as many 3d printers seem to, we can find the device here:
ls -lah /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 Aug 27 15:41 /dev/ttyUSB0
As you can see, the device is owned by root and in the group dialout.
In order to allow ourselves, or our Octoprint service account, access we need to add that user to the dialout group.
How can we see v4l2 capable video devices?
# install via `dnf install v4l-utils`
sudo v4l2-ctl --list-devices
C922 Pro Stream Webcam
/dev/video2
/dev/video3
/dev/media1
dnf search kernel-modules-extra
dnf search kernel-modules-extra
| [Unit] | |
| Description=Unload and reload the wifi module after computer resumes from suspend. | |
| After=suspend.target | |
| [Service] | |
| User=root | |
| Type=oneshot | |
| ExecStart=/bin/bash -c "/usr/sbin/rmmod brcmfmac && /usr/sbin/modprobe brcmfmac" | |
| TimeoutSec=0 | |
| StandardOutput=syslog |
| function locale(){ | |
| if (navigator.languages != undefined) | |
| return navigator.languages[0]; | |
| else | |
| return navigator.language; | |
| } | |
| function showGdprNotice(){ | |
| const gdprCountries = [ |
| import React from 'react' | |
| import { Link } from 'react-router-dom' | |
| const TableView = props => ( | |
| <div class="row m-b-20"> | |
| <div class="col-xs-12 col-lg-9"> | |
| <h4> Watches </h4> | |
| <p>All watches</p> | |
| </div> | |
| <div class="col-xs-12 col-lg-3"> |
| #!/bin/ash | |
| opkg update | |
| opkg install collectd | |
| . /etc/init.d/collectd enable | |
| . /etc/init.d/collectd start | |
| opkg install luci-app-statistics collectd-mod-rrdtool collectd-mod-processes collectd-mod-interface collectd-mod-iptables collectd-mod-netlink collectd-mod-cpu collectd-mod-curl collectd-mod-df collectd-mod-disk collectd-mod-dns collectd-mod-interface collectd-mod-iptables collectd-mod-load collectd-mod-irq collectd-mod-memory collectd-mod-network collectd-mod-ntpd collectd-mod-openvpn collectd-mod-ping collectd-mod-processes collectd-mod-thermal collectd-mod-uptime collectd-mod-users collectd-mod-wireless collectd-mod-vmem libnetsnmp liboping libcurl |
| Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' open.scdn.co www.google-analytics.com cdn.ravenjs.com vt.myvisualiq.net www.gstatic.com". Either the 'unsafe-inline' keyword, a hash ('sha256-exNIbRoBufGA8Xw81IIBBDk1C1yh5NkucdznLehlx2g='), or a nonce ('nonce-...') is required to enable inline execution. | |
| rocket%20league:1 The SSL certificate used to load resources from https://audio-akp-spotify-com.akamaized.net will be distrusted in M70. Once distrusted, users will be prevented from loading these resources. See https://g.co/chrome/symantecpkicerts for more information. | |
| 3rocket%20league:1 Failed to load https://audio-akp-spotify-com.akamaized.net/audio/8af5e6367293321b87a6c98464b9a5ccdb9cfffc?__token__=exp=1520453659~hmac=24db9db34f046bed5e4b579d1e0335a461626b71f308fcd5d9f168ae00e88fa5: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resourc |
| [Unit] | |
| Description=Ensure that the grafana process is running | |
| After=network-online.target | |
| [Service] | |
| User=grafana | |
| Group=grafana | |
| Restart=always | |
| WorkingDirectory=/opt/grafana/ | |
| ExecStart=/opt/grafana/bin/grafana-server web |