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Running Xubuntu 16.04.1 LTS 64-bit.

/proc/sys/kernel/yama/ptrace_scope keeps resetting to 1 if I reboot, despite me changing it to 0 manually. How can I keep ptrace_scope set to a value of 0?

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2 Answers 2

Reset to default
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/proc values are stored in RAM so it isn't persistent. But it read its initial values from a file. You can permanently change the value of /proc/sys/kernel/yama/ptrace_scope to 0 by editing the file /etc/sysctl.d/10-ptrace.conf and change the line:

kernel.yama.ptrace_scope = 1

To 

kernel.yama.ptrace_scope = 0
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3
  • Is any security risk attached to setting this permanently?
    – Philipp Ludwig
    Jun 25, 2018 at 18:59
  • 2
    Yes, there is some risks. You can view this post for more details [askubuntu.com/questions/146160/…
    – Dababi
    Jul 2, 2018 at 8:41
  • Well i showns how crazy the security boys have gotten. If you run a program under your user id it already can do enough damage.
    – Lothar
    Feb 27, 2021 at 18:22
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In case the change doesn't reflect in /proc/sys/kernel/yama/ptrace_scope, try doing:

echo "0"|sudo tee /proc/sys/kernel/yama/ptrace_scope
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