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I have the this error when I run sysctl -p in Debian 5.0.8.

error: "net.netfilter.nf_conntrack_acct" is an unknown key

My sysctl configuration

net.netfilter.nf_conntrack_acct = 1
net.ipv4.netfilter.ip_conntrack_max = 9527600
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 7200

Output of lsmod

ipv6                  289352  34 
loop                   19724  0 
nf_conntrack_ipv4      19352  0 
nf_conntrack           71440  1 nf_conntrack_ipv4
joydev                 15232  0 
evdev                  14592  0 
ext3                  125456  3 
jbd                    54696  1 ext3
mbcache                13188  1 ext3
raid1                  24832  4 
md_mod                 81700  5 raid1
thermal_sys            17728  0 

Any idea?

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up vote 2 down vote accepted

Well, it's saying that you have a setting net.netfilter.nf_conntrack_acct in your /etc/sysctl.conf, but when sysctl tries to load that setting it has no idea what it is. Did this used to work in the past? Maybe you installed a new kernel which does not support that sysctl.

EDIT: based on your comment about the kernel version you are using, it looks like your older Debian does not support that sysctl. See this debian mailing list thread for details - looks like it was added in 2.6.29.

You will have to recompile your kernel or upgrade to enable that feature.

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i used in centos, its the first time in debian 2.6.26-2-xen-amd64 – anonymous Feb 4 '11 at 23:16

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