Nice article on how to enable and use the sysrq key.
A .tar.gz file is nothing, but a compressed archive. The below URL provides a list of commonly used tar commands.
Clear PageCache only.
# sync; echo 1 > /proc/sys/vm/drop_caches
Clear dentries and inodes.
# sync; echo 2 > /proc/sys/vm/drop_caches
Clear PageCache, dentries and inodes.
# sync; echo 3 > /proc/sys/vm/drop_caches
The random changes have been sent in for Linux 5.6 that yield /dev/random behavioral changes and a new random flag.
With the onset of a new decade, Linux Kernel 5.6 is already prepared to resolve the “Y2038” or “Unix Y2K” problem that can arise in the upcoming decade.
Linus Torvalds has released the first stable Linux kernel update of 2020, Linux 5.5 – and it’s on schedule despite the worries that downtime over the holidays would have an impact on its release. The Linux 5.5 kernel update (dubbed “Kleptomaniac Octopus”) brings a host of performance tweaks as well as support for devices like the Raspberry Pi 4 and Broadcom chip BCM2711.
You can use the logger tool. The simple command to log is
logger My syslog message from console.