Search notes:

Kernel parameters

Kernel parameters can be configured at run time with sysctl

Possible kernel parameters are those listed under /proc/sys or those listed in Documentation/admin-guide/kernel-parameters.rst

Use sysctl -a to display all currently available values.

kernel.yama.ptrace_scope

kernel.yama.ptrace_scope controls which processes can be traced with strace:

0 = All processes running under the same UID can be traced
1 = Only parent process are allowed
2 = Only an administrator can trace other processes
3 = No processes whatsoever can be traced

TODO

Find all «first level components»

$ sudo sysctl -a | sed 's/\..*//' | sort -u
abi
debug
dev
fs
kernel
net
sunrpc
user
vm

See also

Linux kernel command line

/proc/cmdline