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I've installed Play On Linux and was trying to install a game along with some libs and this error popped up while installing Microsoft NET Framework 2.0 if I'm not mistaken.. telling to change this line content from 1 to 0:

/proc/sys/kernel/yama/ptrace_scope

I tried changing it with gedit or whatever but it just won't save it. What is this line standing for? And is it safe to change it and how?

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1 Answer 1

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2

You need sudo permission to edit that file.

Try this instead:

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

To verify the change, run the following command:

cat /proc/sys/kernel/yama/ptrace_scope

It should reply

0

see here for some related info

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    hm it actually works I tried to edit some other way indeed :) also can you tell what permission that line stands for?
    – JoKeR
    Nov 16, 2015 at 8:53
  • @joker you have super user permission when you execute a command with sudo. For example, you could have ran this command earlier and would have had the permission necessary to save the file: sudo gedit /proc/sys/kernel/yama/ptrace_scope
    – mchid
    Nov 16, 2015 at 19:22
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    @joker as far as the 0 is concerned, I don't know, I just noticed you needed to use sudo to edit that file and echo sudo tee is an easy way to do that.
    – mchid
    Nov 16, 2015 at 19:25
  • thanks your example worked but for some reason when I launch it with sudo gedit /proc/sys/kernel/yama/ptrace_scope via GUI for some reason it didn't work.
    – JoKeR
    Nov 17, 2015 at 9:15
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    @JoKeR actually, try this instead: sudo -i gedit /proc/sys/kernel/yama/ptrace_scope edit the file to say 0, save the file and then close gedit. Run cat /proc/sys/kernel/yama/ptrace_scope to verify the output is 0.
    – mchid
    Nov 17, 2015 at 13:19

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