How To Resolve cat: /proc/slabinfo: Permission denied properly

redhatwannabe · 01-13-2016, 07:15 PM

Dear all,

I have an existing script which has the following line

Code:

SLABINFO='cat /proc/slabinfo'

when I run the command manually, I encounter the following error:

Code:

[oracle@ol71-112-db ~]$ cat /proc/slabinfo
cat: /proc/slabinfo: Permission denied

my os is as follow:

Code:

cat /etc/oracle-release
Oracle Linux Server release 7.1

so how do I cat /proc/slabinfo without any permision error.

thanks and many thanks

schneidz · 01-13-2016, 07:34 PM

Code:

[schneidz@hyper lq]$ ll /proc/slabinfo
-r--------. 1 root root 0 Jan 13 20:33 /proc/slabinfo
[schneidz@hyper lq]$ sudo cat /proc/slabinfo
...

sundialsvcs · 01-13-2016, 07:43 PM

As you (should ...) know, the /proc "filesystem" is actually a Linux kernel API. These "files and directories" do not actually, physically, exist. Instead, your request to "do something with these (non-existent ...) 'things'" is interpreted and acted-upon by the kernel itself.

In this case, Linux is refusing to provide you with any information, because you are not root.