The error “Unable to retrieve PJSIP transport …” occurs when TRANSPORT does not exist or is specified incorrectly.
Continue reading “Solution Unable to retrieve PJSIP transport in Asterisk”Category Archives: Linux
Setting up nftables
In this article I will give examples of setting up nftables to replace the outdated iptables.
Continue reading “Setting up nftables”How to change gateway in Linux
Once I needed to change the default gateway on different servers without restarting the network service or rebooting the server, I will give examples of how I did this.
Continue reading “How to change gateway in Linux”Monitoring Linux directory size in Zabbix
One day I needed to monitor the size of a directory in Zabbix and create a trigger so that Zabbix would notify when the directory size increases.
Continue reading “Monitoring Linux directory size in Zabbix”How to add a blackhole route in Netplan
I will give an example of setting up blackhole routes in Netplan.
Continue reading “How to add a blackhole route in Netplan”Setting up Firewall in Proxmox
I will give an example of enabling and configuring the Firewall in Proxmox. By default, the Firewall is disabled and there are open ports, for example: SSH, 111, 3128, 8006.
Continue reading “Setting up Firewall in Proxmox”How to restrict access to the Proxmox WEB interface
I will give an example of restricting access to the Proxmox web interface on port 8006.
Continue reading “How to restrict access to the Proxmox WEB interface”Key ‘x’ doesn’t exist in table ‘x’
Once after updating the ABillS billing system, when opening the Maintenance>Hardware>PON menu and selecting a device, an SQL error occurred:
Upgrade from Ubuntu 20.04 to 22.04 using “do-release-upgrade” command
For example, I will upgrade Ubuntu Server 20.04 to version 22.04.
Bird log rotation
I will give an example of the Bird log rotation script, since by default it was not in Ubuntu 18 and in neighboring versions too.