Nice high level article on swap files. How to find the allocated swap file size, location, allocate new swap file for increasing or decreasing the swap file size, adjust the swappiness and remove a swap file.
Category: Linux
Linux 5.14 updates
removed the old IDE support.
Support for Rust programming language
mainline support for Raspbery pi 400
NVMeTCP optimizations.
Source: Linux kernel sheds legacy IDE support, but driver-dominated 5.14 rc1 still grows • The Register
Some cases you may have to disable the AHCI driver claiming the software device. You can use any one of the below options to blacklist the AHCI driver. This depends on the kernel version you use.
ahci.blacklist=yes
modprobe.blacklist=ahci
rdblacklist=ahciHow to configure nic or netwok bonding in CentOS 7 & RHEL 7
Source: Configure NIC(Network Interface Card) bonding in CentOS 7 / RHEL 7
use the kernel core_pattern parameter. This may be useful if you want to save the core in an NFS location.
[root@test:~]$cat /proc/sys/kernel/core_pattern
/var/core/dumps/%t_%e_core.%p
[root@test:~]$sysctl -w kernel.core_pattern=’/remote/dumps/%t_%e_core.%p’
[root@test:~]$cat /proc/sys/kernel/core_pattern
/remote/dumps/%t_%e_core.%p
Nice article on using printk for debugging. It explains the usage, log level, rate limiting and one time messaging, changing the size of printk buffer, debugging early boot problems etc.
Refer Debugging by printing
A nice article on kubernetes.
Source: What Is Kubernetes? An Introduction to the Container Orchestration Platform