Once I needed to use rsync to copy a lot of data from the server to which only the root user had access, so I allowed the root user to connect via ssh.
Continue reading “SSH root connection in Ubuntu”Category Archives: Linux
Solution BUG: Bad page state in process kworker
Once I assembled a new access server with Accel-ppp and Intel XL710 network adapters, and after putting it into operation, I noticed that all processor cores are used evenly, and the tenth core is used almost 100%, and I also noticed messages in the logs:
Continue reading “Solution BUG: Bad page state in process kworker”How to set up iBGP in Bird
For example, I will configure the internal BGP protocol in Bird, in my case iBGP was needed in order to transfer user routes from several access servers to a NAT server. As access servers, I configured Accel-ppp (ipoe) and JuniperMX, they all worked simultaneously and balanced users by making an artificial DHCPOFFER delay.
Continue reading “How to set up iBGP in Bird”How to disable conntrack on Linux
I will give an example of disabling the conntrack module, for example, I will take the Ubuntu operating system.
Continue reading “How to disable conntrack on Linux”Asterisk Administrator Guide (pdf)
Download Asterisk Administrator Guide
File Format: PDF
Pages: 679
Language: English
File size: 4.42 MB
Configuring Juniper MX and ABillS
For example, I will configure the Juniper MX204 to work with the ABillS billing system.
Continue reading “Configuring Juniper MX and ABillS”How to specify a port for snmpwalk
Once I needed to perform snmpwalk with a non-standard SNMP port, since the devices that were polled were behind the same router, so the ports were forwarded to them.
Continue reading “How to specify a port for snmpwalk”BIRD BGP: Unexpected connect from unknown address
Once I set it up on a new BIRD server and noticed entries in the logs:
Continue reading “BIRD BGP: Unexpected connect from unknown address”Messages net_ratelimit: X callbacks suppressed
Once I found the following messages in the dmesg log:
Continue reading “Messages net_ratelimit: X callbacks suppressed”Solution write error: Value too large for defined data type
Once I manually bind the interrupts of the Intel network adapter to the processor cores and ran into an error:
Continue reading “Solution write error: Value too large for defined data type”