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We can display a
list of the variables as shown in the following shell command sequence:
Kernel Tuning with sysctl 503
24
sysctl -A
kernel.HZ = 1000
kernel.min-timeslice = 1000
kernel.def-timeslice = 21000
kernel.ngroups_max = 65536
kernel.printk_ratelimit_burst = 10
kernel.printk_ratelimit = 5
kernel.panic_on_oops = 0
kernel.pid_max = 32768
kernel.overflowgid = 65534
kernel.overflowuid = 65534
kernel.pty.nr = 5
kernel.pty.max = 4096
kernel.random.uuid = 7e576126-6356-4159-afd3-4de6a0227736
kernel.random.boot_id = 152ee742-ef9d-49c5-a271-cb98662ddc7e
kernel.random.write_wakeup_threshold = 128
kernel.random.read_wakeup_threshold = 64
This is just a partial listing of some kernel settings??”the whole list runs about 20 pages.
For this reason, you may want to pipe the command through less, which is the GNU
pager.
NOTE
To see the full list of variables, enter sysctl -A at the shell prompt. You can learn
more about working with the kernel by reviewing the kernel API documentation at
http://kernelnewbies.org/documents/kdoc/kernel-api/linuxkernelapi.


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