On Mon, May 2, 2016 at 11:20 AM, <[email protected]> wrote: > > > Here the result: > root@c0a80090:/sys/devices/w1_bus_master1# ls -lZ > w1_master_max_slave_count > -r--r--r-- 1 root root ? 4096 May 2 14:45 w1_master_max_slave_count > > I try to use "chmod 777 w1_master_max_slave_count" and then the command > again, but then I get: > root@c0a80090:/sys/devices/w1_bus_master1# ls -lZ > w1_master_max_slave_count > -rwxrwxrwx 1 root root ? 4096 May 2 15:18 w1_master_max_slave_count > root@c0a80090:/sys/devices/w1_bus_master1# echo 20 > > w1_master_max_slave_count > bash: echo: write error: Input/output error > > OK, I am out of ideas---you have correctly modified the Unix filesystem permissions, but it still doesn't work. I see that SELinux data is missing (the '?' part). I don't remember and can't check right now which SElinux mode is Debian in (off/permissive/enforcing). Check the result of 'getenforce' command.
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