"Linux is a family of free and open-source software operating systems built around the Linux kernel." - https://en.wikipedia.org/wiki/Linux
Most linux distros are built on GNU tools, and this article is relevant in distinguishing the importance GNU plays in the linux ecosystem: https://www.gnu.org/gnu/why-gnu-linux.en.html
Linux is part of the Unix family tree.
- Linux Load Averages: Solving the Mystery
- Brendan Gregg's Linux Performance page
- Notes from the Linux Performance Monitoring talk at Velocity 2015
Determine if running kernel is 32 or 64 bit
Works on x86 or ARM.
Configure a system to reboot on kernel panic
These lines should be added to
## Reboot after 10 seconds if kernel panics kernel.panic = 10 ## Treat all oopses as panics kernel.panic_on_oops = 1
Force reboot on corrupt system
For times that commands like
shutdown are not available.
echo 1 > /proc/sys/kernel/sysrq echo b > /proc/sysrq-trigger
Show process signals
This should work on other unixes too.
- Filesystem Hierarchy Standards: http://refspecs.linuxfoundation.org/FHS_3.0/fhs/index.html