On Ubuntu server, when I run lspci command, i get the error
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root@first-vm:~# lspci -bash: lspci: command not found root@first-vm:~# |
To fix this error, install package pciutils
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apt install -y pciutils |
See lspci […]
On CyberPanel server, FTP was not working. I checked the server with “netstat -lntp” command. No service was listening on port 21. Started pure-ftpd with command
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systemctl start pure-ftpd-mysql |
To start pure-ftpd on boot, run
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systemctl enable pure-ftpd-mysql |
Now FTP service started listening on port 21, but login to the FTP server failed with an error “Login authentication failed”. […]
On Ubuntu 18.04 server running PHP 7.2, i want to install Microsoft SQL Server module for PHP. You can find PHP module for SQL server at https://github.com/microsoft/msphpsql At the time of writing this PHP module only support PHP 7.4 and newer. SO i need to find older version that supported PHP 7.2. On checking release […]
To install microk8s, run
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sudo snap install microk8s --classic |
Enable rules in firewall
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sudo ufw allow in on cni0 sudo ufw allow out on cni0 sudo ufw default allow routed |
Enable addons
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microk8s enable dns dashboard storage |
To see status of current addons, run
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microk8s status |
Here is status for a defaul install
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root@ip-172-26-0-217:~# microk8s status microk8s is running high-availability: no datastore master nodes: 127.0.0.1:19001 datastore standby nodes: none addons: enabled: ha-cluster # Configure high availability on the current node disabled: ambassador # Ambassador API Gateway and Ingress cilium # SDN, fast with full network policy dashboard # The Kubernetes dashboard dns # CoreDNS fluentd # Elasticsearch-Fluentd-Kibana logging and monitoring gpu # Automatic enablement of Nvidia CUDA helm # Helm 2 - the package manager for Kubernetes helm3 # Helm 3 - Kubernetes package manager host-access # Allow Pods connecting to Host services smoothly ingress # Ingress controller for external access istio # Core Istio service mesh services jaeger # Kubernetes Jaeger operator with its simple config keda # Kubernetes-based Event Driven Autoscaling knative # The Knative framework on Kubernetes. kubeflow # Kubeflow for easy ML deployments linkerd # Linkerd is a service mesh for Kubernetes and other frameworks metallb # Loadbalancer for your Kubernetes cluster metrics-server # K8s Metrics Server for API access to service metrics multus # Multus CNI enables attaching multiple network interfaces to pods portainer # Portainer UI for your Kubernetes cluster prometheus # Prometheus operator for monitoring and logging rbac # Role-Based Access Control for authorisation registry # Private image registry exposed on localhost:32000 storage # Storage class; allocates storage from host directory traefik # traefik Ingress controller for external access root@ip-172-26-0-217:~# |
To see all pods/services/deploymens, run
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microk8s kubectl get all --all-namespaces |
To avoid typing microk8s before kubectl, run
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alias kubectl="microk8s kubectl" |
You can add this to .bashrc to make it permanent. To run […]
dnsmasq is a very powerful tool that can provide basic dns services/caching, act as dhcp server and also as tftp server. To install dnsmasq, run
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apt install dnsmasq |
When you start dnsmasq, if it complain about port 53 alreay in use
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dnsmasq: failed to create listening socket for port 53: Address already in use |
This is because some other service is running on port 53. To find what service […]
To enable firewal for Ant Media Server on Ubnuntu server, use following rules
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ufw allow ssh ufw allow http ufw allow https ufw allow 1935/tcp ufw allow 5080/tcp ufw allow 5443/tcp ufw allow 5000:65000/udp enable ufw |
After enabling, you will have following status
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root@server:~# ufw status Status: active To Action From -- ------ ---- 22/tcp ALLOW Anywhere 80/tcp ALLOW Anywhere 443/tcp ALLOW Anywhere 1935/tcp ALLOW Anywhere 5080/tcp ALLOW Anywhere 5443/tcp ALLOW Anywhere 5000:65000/udp ALLOW Anywhere 22/tcp (v6) ALLOW Anywhere (v6) 80/tcp (v6) ALLOW Anywhere (v6) 443/tcp (v6) ALLOW Anywhere (v6) 1935/tcp (v6) ALLOW Anywhere (v6) 5080/tcp (v6) ALLOW Anywhere (v6) 5443/tcp (v6) ALLOW Anywhere (v6) 5000:65000/udp (v6) ALLOW Anywhere (v6) root@server:~# |
Port forwarding You can forward port 80 and 443 to Ant Media Server, so you don’t have to use ports. You can use following iptables commands
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sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 5080 sudo iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-port 5443 |
To make it permanent, edit
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vi /etc/ufw/before.rules |
[…]
To reinstall Kernel in Ubunru, you need to find the version of kernal installed, for this run
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dpkg -l | grep linux-image |
Or you can use command, find the kernel version you need to install
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apt-cache search linux-image |
Once you have the name of linux-image package you need to install, you can run
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apt-get install --reinstall PKG_NAME_HERE |
Example See apt, Ubuntu, Debian […]
Shotcut is an free open source video editor for Ubuntu. You can find more info at https://shotcut.org Latest version of Shotcut video editor can be installed on Ubuntu using command
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sudo snap install shotcut --classic |
shotcut is also available to be installed from apt, but this is slightly older version than snap. To install from apt, use command
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sudo apt install shotcut |
[…]
To configure IP in Ubuntu 20.04 guest, create file
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vi /etc/netplan/50-cloud-init.yaml |
add following content
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network: version: 2 ethernets: eth0: addresses: - YOUR_FO_IP_HERE/32 nameservers: addresses: - 1.1.1.1 search: [] optional: true routes: - to: 0.0.0.0/0 via: YOUR_GW_IP_HERE on-link: true |
example
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root@easyengine:~# cat /etc/netplan/50-cloud-init.yaml network: version: 2 ethernets: eth0: addresses: - 164.132.150.95/32 nameservers: addresses: - 1.1.1.1 search: [] optional: true routes: - to: 0.0.0.0/0 via: 51.255.79.254 on-link: true root@easyengine:~# |
Test network config using
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netplan try |
If everything works fine, you can apply the changes with
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netplan apply |
See OVH, netplan […]
Left Shift key on my keyboard started acting up. It some times work, some times it won’t. I never use the caps lock key on my kayboard, this is just above the shift key. So i decided to use this key as left shift key. To re-assign key, you need to edit file /usr/share/X11/xkb/symbols/pc Lets […]