• see your kernel parameters

   $ sudo sysctl -a
  kernel.panic = 0
  kernel.core_uses_pid = 0
  kernel.core_pattern = |/usr/share/apport/apport
  kernel.tainted = 0
  kernel.cap-bound = -257
  kernel.real-root-dev = 0
  kernel.ctrl-alt-del = 0
  kernel.printk = 4	4	1	7
  kernel.modprobe = /sbin/modprobe
  kernel.hotplug = 
  kernel.acct = 4	2	30
  kernel.sysrq = 1
  kernel.cad_pid = 1
  kernel.threads-max = 40957
  kernel.random.poolsize = 4096
  kernel.random.entropy_avail = 3587
  kernel.random.read_wakeup_threshold = 64
  kernel.random.write_wakeup_threshold = 128
  kernel.random.boot_id = 6b16bcbf-b723-4262-a668-0b8764d8db29
  kernel.random.uuid = 10dd9728-d406-48af-88ce-d104caba46b9
  kernel.pty.max = 4096
  kernel.pty.nr = 1
  kernel.overflowuid = 65534
  kernel.overflowgid = 65534
  kernel.pid_max = 32768
  kernel.panic_on_oops = 0
  kernel.printk_ratelimit = 5
  kernel.printk_ratelimit_burst = 10
  kernel.ngroups_max = 65536
  kernel.unknown_nmi_panic = 0
  kernel.nmi_watchdog = 0
  kernel.panic_on_unrecovered_nmi = 0
  kernel.bootloader_type = 113
  kernel.kstack_depth_to_print = 24
  kernel.randomize_va_space = 1
  kernel.acpi_video_flags = 0
  kernel.max_lock_depth = 1024
  kernel.maps_protect = 1
  kernel.ostype = Linux
  kernel.osrelease = 2.6.22-14-generic
  kernel.version = #1 SMP Tue Feb 12 07:42:25 UTC 2008
  kernel.hostname = rocky
  kernel.domainname = (none)
  kernel.shmmax = 33554432
  kernel.shmall = 2097152
  kernel.shmmni = 4096
  kernel.msgmax = 8192
  kernel.msgmni = 16
  kernel.msgmnb = 16384
  kernel.sem = 250	32000	32	128
  vm.overcommit_memory = 0
  vm.panic_on_oom = 0
  vm.overcommit_ratio = 50
  vm.page-cluster = 3
  vm.dirty_background_ratio = 5
  vm.dirty_ratio = 10
  vm.dirty_writeback_centisecs = 500
  vm.dirty_expire_centisecs = 3000
  vm.nr_pdflush_threads = 2
  vm.swappiness = 60
  vm.lowmem_reserve_ratio = 256	32
  vm.drop_caches = 0
  vm.min_free_kbytes = 3816
  vm.percpu_pagelist_fraction = 0
  vm.max_map_count = 65536
  vm.laptop_mode = 0
  vm.block_dump = 0
  vm.vfs_cache_pressure = 100
  vm.legacy_va_layout = 0
  vm.stat_interval = 1
  vm.vdso_enabled = 2
  net.core.wmem_max = 131071
  net.core.rmem_max = 131071
  net.core.wmem_default = 110592
  net.core.rmem_default = 110592
  net.core.dev_weight = 64
  net.core.netdev_max_backlog = 1000
  net.core.message_cost = 5
  net.core.message_burst = 10
  net.core.optmem_max = 10240
  net.core.xfrm_aevent_etime = 10
  net.core.xfrm_aevent_rseqth = 2
  net.core.xfrm_larval_drop = 0
  net.core.xfrm_acq_expires = 30
  net.core.somaxconn = 128
  net.core.netdev_budget = 300
  net.core.warnings = 1
  net.ipv4.tcp_timestamps = 1
  net.ipv4.tcp_window_scaling = 1
  net.ipv4.tcp_sack = 1
  net.ipv4.tcp_retrans_collapse = 1
  net.ipv4.ip_forward = 0
  net.ipv4.ip_default_ttl = 64
  net.ipv4.ip_no_pmtu_disc = 0
  net.ipv4.ip_nonlocal_bind = 0
  net.ipv4.tcp_syn_retries = 5
  net.ipv4.tcp_synack_retries = 5
  net.ipv4.tcp_max_orphans = 32768
  net.ipv4.tcp_max_tw_buckets = 180000
  net.ipv4.ipfrag_high_thresh = 262144
  net.ipv4.ipfrag_low_thresh = 196608
  net.ipv4.ip_dynaddr = 0
  net.ipv4.ipfrag_time = 30
  net.ipv4.tcp_keepalive_time = 7200
  net.ipv4.tcp_keepalive_probes = 9
  net.ipv4.tcp_keepalive_intvl = 75
  net.ipv4.tcp_retries1 = 3
  net.ipv4.tcp_retries2 = 15
  net.ipv4.tcp_fin_timeout = 60
  net.ipv4.tcp_syncookies = 0
  net.ipv4.tcp_tw_recycle = 0
  net.ipv4.tcp_abort_on_overflow = 0
  net.ipv4.tcp_stdurg = 0
  net.ipv4.tcp_rfc1337 = 0
  net.ipv4.tcp_max_syn_backlog = 1024
  net.ipv4.ip_local_port_range = 32768	61000
  net.ipv4.icmp_echo_ignore_all = 0
  net.ipv4.icmp_echo_ignore_broadcasts = 1
  net.ipv4.icmp_ignore_bogus_error_responses = 1
  net.ipv4.icmp_errors_use_inbound_ifaddr = 0
  net.ipv4.route.min_delay = 2
  net.ipv4.route.max_delay = 10
  net.ipv4.route.gc_thresh = 32768
  net.ipv4.route.max_size = 524288
  net.ipv4.route.gc_min_interval = 0
  net.ipv4.route.gc_min_interval_ms = 500
  net.ipv4.route.gc_timeout = 300
  net.ipv4.route.gc_interval = 60
  net.ipv4.route.redirect_load = 5
  net.ipv4.route.redirect_number = 9
  net.ipv4.route.redirect_silence = 5120
  net.ipv4.route.error_cost = 250
  net.ipv4.route.error_burst = 1250
  net.ipv4.route.gc_elasticity = 8
  net.ipv4.route.mtu_expires = 600
  net.ipv4.route.min_pmtu = 552
  net.ipv4.route.min_adv_mss = 256
  net.ipv4.route.secret_interval = 600
  net.ipv4.igmp_max_memberships = 20
  net.ipv4.igmp_max_msf = 10
  net.ipv4.inet_peer_threshold = 65664
  net.ipv4.inet_peer_minttl = 120
  net.ipv4.inet_peer_maxttl = 600
  net.ipv4.inet_peer_gc_mintime = 10
  net.ipv4.inet_peer_gc_maxtime = 120
  net.ipv4.tcp_orphan_retries = 0
  net.ipv4.tcp_fack = 1
  net.ipv4.tcp_reordering = 3
  net.ipv4.tcp_ecn = 0
  net.ipv4.tcp_dsack = 1
  net.ipv4.tcp_mem = 243744	324992	487488
  net.ipv4.tcp_wmem = 4096	16384	4194304
  net.ipv4.tcp_rmem = 4096	87380	4194304
  net.ipv4.tcp_app_win = 31
  net.ipv4.tcp_adv_win_scale = 2
  net.ipv4.icmp_ratelimit = 250
  net.ipv4.icmp_ratemask = 6168
  net.ipv4.tcp_tw_reuse = 0
  net.ipv4.tcp_frto = 0
  net.ipv4.tcp_frto_response = 0
  net.ipv4.tcp_low_latency = 0
  net.ipv4.ipfrag_secret_interval = 600
  net.ipv4.ipfrag_max_dist = 64
  net.ipv4.tcp_no_metrics_save = 0
  net.ipv4.tcp_moderate_rcvbuf = 1
  net.ipv4.tcp_tso_win_divisor = 3
  net.ipv4.tcp_congestion_control = cubic
  net.ipv4.tcp_abc = 0
  net.ipv4.tcp_mtu_probing = 0
  net.ipv4.tcp_base_mss = 512
  net.ipv4.tcp_workaround_signed_windows = 0
  net.ipv4.tcp_dma_copybreak = 4096
  net.ipv4.tcp_slow_start_after_idle = 1
  net.ipv4.tcp_available_congestion_control = cubic reno
  net.ipv4.tcp_allowed_congestion_control = cubic reno
  net.ipv4.tcp_max_ssthresh = 0
  net.ipv4.neigh.default.mcast_solicit = 3
  net.ipv4.neigh.default.ucast_solicit = 3
  net.ipv4.neigh.default.app_solicit = 0
  net.ipv4.neigh.default.retrans_time = 100
  net.ipv4.neigh.default.base_reachable_time = 30
  net.ipv4.neigh.default.delay_first_probe_time = 5
  net.ipv4.neigh.default.gc_stale_time = 60
  net.ipv4.neigh.default.unres_qlen = 3
  net.ipv4.neigh.default.proxy_qlen = 64
  net.ipv4.neigh.default.anycast_delay = 100
  net.ipv4.neigh.default.proxy_delay = 80
  net.ipv4.neigh.default.locktime = 100
  net.ipv4.neigh.default.gc_interval = 30
  net.ipv4.neigh.default.gc_thresh1 = 128
  net.ipv4.neigh.default.gc_thresh2 = 512
  net.ipv4.neigh.default.gc_thresh3 = 1024
  net.ipv4.neigh.default.retrans_time_ms = 1000
  net.ipv4.neigh.default.base_reachable_time_ms = 30000
  net.ipv4.neigh.lo.mcast_solicit = 3
  net.ipv4.neigh.lo.ucast_solicit = 3
  net.ipv4.neigh.lo.app_solicit = 0
  net.ipv4.neigh.lo.retrans_time = 100
  net.ipv4.neigh.lo.base_reachable_time = 30
  net.ipv4.neigh.lo.delay_first_probe_time = 5
  net.ipv4.neigh.lo.gc_stale_time = 60
  net.ipv4.neigh.lo.unres_qlen = 3
  net.ipv4.neigh.lo.proxy_qlen = 64
  net.ipv4.neigh.lo.anycast_delay = 100
  net.ipv4.neigh.lo.proxy_delay = 80
  net.ipv4.neigh.lo.locktime = 100
  net.ipv4.neigh.lo.retrans_time_ms = 1000
  net.ipv4.neigh.lo.base_reachable_time_ms = 30000
  net.ipv4.neigh.eth0.mcast_solicit = 3
  net.ipv4.neigh.eth0.ucast_solicit = 3
  net.ipv4.neigh.eth0.app_solicit = 0
  net.ipv4.neigh.eth0.retrans_time = 100
  net.ipv4.neigh.eth0.base_reachable_time = 30
  net.ipv4.neigh.eth0.delay_first_probe_time = 5
  net.ipv4.neigh.eth0.gc_stale_time = 60
  net.ipv4.neigh.eth0.unres_qlen = 3
  net.ipv4.neigh.eth0.proxy_qlen = 64
  net.ipv4.neigh.eth0.anycast_delay = 100
  net.ipv4.neigh.eth0.proxy_delay = 80
  net.ipv4.neigh.eth0.locktime = 100
  net.ipv4.neigh.eth0.retrans_time_ms = 1000
  net.ipv4.neigh.eth0.base_reachable_time_ms = 30000
  net.ipv4.conf.all.forwarding = 0
  net.ipv4.conf.all.mc_forwarding = 0
  net.ipv4.conf.all.accept_redirects = 1
  net.ipv4.conf.all.secure_redirects = 1
  net.ipv4.conf.all.shared_media = 1
  net.ipv4.conf.all.rp_filter = 0
  net.ipv4.conf.all.send_redirects = 1
  net.ipv4.conf.all.accept_source_route = 0
  net.ipv4.conf.all.proxy_arp = 0
  net.ipv4.conf.all.medium_id = 0
  net.ipv4.conf.all.bootp_relay = 0
  net.ipv4.conf.all.log_martians = 0
  net.ipv4.conf.all.tag = 0
  net.ipv4.conf.all.arp_filter = 0
  net.ipv4.conf.all.arp_announce = 0
  net.ipv4.conf.all.arp_ignore = 0
  net.ipv4.conf.all.arp_accept = 0
  net.ipv4.conf.all.disable_xfrm = 0
  net.ipv4.conf.all.disable_policy = 0
  net.ipv4.conf.all.force_igmp_version = 0
  net.ipv4.conf.all.promote_secondaries = 0
  net.ipv4.conf.default.forwarding = 0
  net.ipv4.conf.default.mc_forwarding = 0
  net.ipv4.conf.default.accept_redirects = 1
  net.ipv4.conf.default.secure_redirects = 1
  net.ipv4.conf.default.shared_media = 1
  net.ipv4.conf.default.rp_filter = 0
  net.ipv4.conf.default.send_redirects = 1
  net.ipv4.conf.default.accept_source_route = 1
  net.ipv4.conf.default.proxy_arp = 0
  net.ipv4.conf.default.medium_id = 0
  net.ipv4.conf.default.bootp_relay = 0
  net.ipv4.conf.default.log_martians = 0
  net.ipv4.conf.default.tag = 0
  net.ipv4.conf.default.arp_filter = 0
  net.ipv4.conf.default.arp_announce = 0
  net.ipv4.conf.default.arp_ignore = 0
  net.ipv4.conf.default.arp_accept = 0
  net.ipv4.conf.default.disable_xfrm = 0
  net.ipv4.conf.default.disable_policy = 0
  net.ipv4.conf.default.force_igmp_version = 0
  net.ipv4.conf.default.promote_secondaries = 0
  net.ipv4.conf.lo.forwarding = 0
  net.ipv4.conf.lo.mc_forwarding = 0
  net.ipv4.conf.lo.accept_redirects = 1
  net.ipv4.conf.lo.secure_redirects = 1
  net.ipv4.conf.lo.shared_media = 1
  net.ipv4.conf.lo.rp_filter = 0
  net.ipv4.conf.lo.send_redirects = 1
  net.ipv4.conf.lo.accept_source_route = 1
  net.ipv4.conf.lo.proxy_arp = 0
  net.ipv4.conf.lo.medium_id = 0
  net.ipv4.conf.lo.bootp_relay = 0
  net.ipv4.conf.lo.log_martians = 0
  net.ipv4.conf.lo.tag = 0
  net.ipv4.conf.lo.arp_filter = 0
  net.ipv4.conf.lo.arp_announce = 0
  net.ipv4.conf.lo.arp_ignore = 0
  net.ipv4.conf.lo.arp_accept = 0
  net.ipv4.conf.lo.disable_xfrm = 1
  net.ipv4.conf.lo.disable_policy = 1
  net.ipv4.conf.lo.force_igmp_version = 0
  net.ipv4.conf.lo.promote_secondaries = 0
  net.ipv4.conf.eth0.forwarding = 0
  net.ipv4.conf.eth0.mc_forwarding = 0
  net.ipv4.conf.eth0.accept_redirects = 1
  net.ipv4.conf.eth0.secure_redirects = 1
  net.ipv4.conf.eth0.shared_media = 1
  net.ipv4.conf.eth0.rp_filter = 0
  net.ipv4.conf.eth0.send_redirects = 1
  net.ipv4.conf.eth0.accept_source_route = 1
  net.ipv4.conf.eth0.proxy_arp = 0
  net.ipv4.conf.eth0.medium_id = 0
  net.ipv4.conf.eth0.bootp_relay = 0
  net.ipv4.conf.eth0.log_martians = 0
  net.ipv4.conf.eth0.tag = 0
  net.ipv4.conf.eth0.arp_filter = 0
  net.ipv4.conf.eth0.arp_announce = 0
  net.ipv4.conf.eth0.arp_ignore = 0
  net.ipv4.conf.eth0.arp_accept = 0
  net.ipv4.conf.eth0.disable_xfrm = 0
  net.ipv4.conf.eth0.disable_policy = 0
  net.ipv4.conf.eth0.force_igmp_version = 0
  net.ipv4.conf.eth0.promote_secondaries = 0
  net.token-ring.rif_timeout = 150000
  net.unix.max_dgram_qlen = 10
  net.ipv6.route.gc_thresh = 1024
  net.ipv6.route.max_size = 4096
  net.ipv6.route.gc_min_interval = 0
  net.ipv6.route.gc_timeout = 60
  net.ipv6.route.gc_interval = 30
  net.ipv6.route.gc_elasticity = 0
  net.ipv6.route.mtu_expires = 600
  net.ipv6.route.min_adv_mss = 4
  net.ipv6.route.gc_min_interval_ms = 500
  net.ipv6.icmp.ratelimit = 250
  net.ipv6.bindv6only = 0
  net.ipv6.ip6frag_high_thresh = 262144
  net.ipv6.ip6frag_low_thresh = 196608
  net.ipv6.ip6frag_time = 60
  net.ipv6.ip6frag_secret_interval = 600
  net.ipv6.mld_max_msf = 64
  net.ipv6.neigh.default.mcast_solicit = 3
  net.ipv6.neigh.default.ucast_solicit = 3
  net.ipv6.neigh.default.app_solicit = 0
  net.ipv6.neigh.default.retrans_time = 250
  net.ipv6.neigh.default.base_reachable_time = 30
  net.ipv6.neigh.default.delay_first_probe_time = 5
  net.ipv6.neigh.default.gc_stale_time = 60
  net.ipv6.neigh.default.unres_qlen = 3
  net.ipv6.neigh.default.proxy_qlen = 64
  net.ipv6.neigh.default.anycast_delay = 100
  net.ipv6.neigh.default.proxy_delay = 80
  net.ipv6.neigh.default.locktime = 0
  net.ipv6.neigh.default.gc_interval = 30
  net.ipv6.neigh.default.gc_thresh1 = 128
  net.ipv6.neigh.default.gc_thresh2 = 512
  net.ipv6.neigh.default.gc_thresh3 = 1024
  net.ipv6.neigh.default.retrans_time_ms = 1000
  net.ipv6.neigh.default.base_reachable_time_ms = 30000
  net.ipv6.neigh.lo.mcast_solicit = 3
  net.ipv6.neigh.lo.ucast_solicit = 3
  net.ipv6.neigh.lo.app_solicit = 0
  net.ipv6.neigh.lo.retrans_time = 250
  net.ipv6.neigh.lo.base_reachable_time = 30
  net.ipv6.neigh.lo.delay_first_probe_time = 5
  net.ipv6.neigh.lo.gc_stale_time = 60
  net.ipv6.neigh.lo.unres_qlen = 3
  net.ipv6.neigh.lo.proxy_qlen = 64
  net.ipv6.neigh.lo.anycast_delay = 100
  net.ipv6.neigh.lo.proxy_delay = 80
  net.ipv6.neigh.lo.locktime = 0
  net.ipv6.neigh.lo.retrans_time_ms = 1000
  net.ipv6.neigh.lo.base_reachable_time_ms = 30000
  net.ipv6.neigh.eth0.mcast_solicit = 3
  net.ipv6.neigh.eth0.ucast_solicit = 3
  net.ipv6.neigh.eth0.app_solicit = 0
  net.ipv6.neigh.eth0.retrans_time = 250
  net.ipv6.neigh.eth0.base_reachable_time = 30
  net.ipv6.neigh.eth0.delay_first_probe_time = 5
  net.ipv6.neigh.eth0.gc_stale_time = 60
  net.ipv6.neigh.eth0.unres_qlen = 3
  net.ipv6.neigh.eth0.proxy_qlen = 64
  net.ipv6.neigh.eth0.anycast_delay = 100
  net.ipv6.neigh.eth0.proxy_delay = 80
  net.ipv6.neigh.eth0.locktime = 0
  net.ipv6.neigh.eth0.retrans_time_ms = 1000
  net.ipv6.neigh.eth0.base_reachable_time_ms = 30000
  net.ipv6.conf.lo.forwarding = 0
  net.ipv6.conf.lo.hop_limit = 64
  net.ipv6.conf.lo.mtu = 16436
  net.ipv6.conf.lo.accept_ra = 1
  net.ipv6.conf.lo.accept_redirects = 1
  net.ipv6.conf.lo.autoconf = 1
  net.ipv6.conf.lo.dad_transmits = 1
  net.ipv6.conf.lo.router_solicitations = 3
  net.ipv6.conf.lo.router_solicitation_interval = 4
  net.ipv6.conf.lo.router_solicitation_delay = 1
  net.ipv6.conf.lo.force_mld_version = 0
  net.ipv6.conf.lo.use_tempaddr = -1
  net.ipv6.conf.lo.temp_valid_lft = 604800
  net.ipv6.conf.lo.temp_prefered_lft = 86400
  net.ipv6.conf.lo.regen_max_retry = 5
  net.ipv6.conf.lo.max_desync_factor = 600
  net.ipv6.conf.lo.max_addresses = 16
  net.ipv6.conf.lo.accept_ra_defrtr = 1
  net.ipv6.conf.lo.accept_ra_pinfo = 1
  net.ipv6.conf.lo.proxy_ndp = 0
  net.ipv6.conf.lo.accept_source_route = 0
  net.ipv6.conf.eth0.forwarding = 0
  net.ipv6.conf.eth0.hop_limit = 64
  net.ipv6.conf.eth0.mtu = 1500
  net.ipv6.conf.eth0.accept_ra = 1
  net.ipv6.conf.eth0.accept_redirects = 1
  net.ipv6.conf.eth0.autoconf = 1
  net.ipv6.conf.eth0.dad_transmits = 1
  net.ipv6.conf.eth0.router_solicitations = 3
  net.ipv6.conf.eth0.router_solicitation_interval = 4
  net.ipv6.conf.eth0.router_solicitation_delay = 1
  net.ipv6.conf.eth0.force_mld_version = 0
  net.ipv6.conf.eth0.use_tempaddr = 0
  net.ipv6.conf.eth0.temp_valid_lft = 604800
  net.ipv6.conf.eth0.temp_prefered_lft = 86400
  net.ipv6.conf.eth0.regen_max_retry = 5
  net.ipv6.conf.eth0.max_desync_factor = 600
  net.ipv6.conf.eth0.max_addresses = 16
  net.ipv6.conf.eth0.accept_ra_defrtr = 1
  net.ipv6.conf.eth0.accept_ra_pinfo = 1
  net.ipv6.conf.eth0.proxy_ndp = 0
  net.ipv6.conf.eth0.accept_source_route = 0
  net.ipv6.conf.all.forwarding = 0
  net.ipv6.conf.all.hop_limit = 64
  net.ipv6.conf.all.mtu = 1280
  net.ipv6.conf.all.accept_ra = 1
  net.ipv6.conf.all.accept_redirects = 1
  net.ipv6.conf.all.autoconf = 1
  net.ipv6.conf.all.dad_transmits = 1
  net.ipv6.conf.all.router_solicitations = 3
  net.ipv6.conf.all.router_solicitation_interval = 4
  net.ipv6.conf.all.router_solicitation_delay = 1
  net.ipv6.conf.all.force_mld_version = 0
  net.ipv6.conf.all.use_tempaddr = 0
  net.ipv6.conf.all.temp_valid_lft = 604800
  net.ipv6.conf.all.temp_prefered_lft = 86400
  net.ipv6.conf.all.regen_max_retry = 5
  net.ipv6.conf.all.max_desync_factor = 600
  net.ipv6.conf.all.max_addresses = 16
  net.ipv6.conf.all.accept_ra_defrtr = 1
  net.ipv6.conf.all.accept_ra_pinfo = 1
  net.ipv6.conf.all.proxy_ndp = 0
  net.ipv6.conf.all.accept_source_route = 0
  net.ipv6.conf.default.forwarding = 0
  net.ipv6.conf.default.hop_limit = 64
  net.ipv6.conf.default.mtu = 1280
  net.ipv6.conf.default.accept_ra = 1
  net.ipv6.conf.default.accept_redirects = 1
  net.ipv6.conf.default.autoconf = 1
  net.ipv6.conf.default.dad_transmits = 1
  net.ipv6.conf.default.router_solicitations = 3
  net.ipv6.conf.default.router_solicitation_interval = 4
  net.ipv6.conf.default.router_solicitation_delay = 1
  net.ipv6.conf.default.force_mld_version = 0
  net.ipv6.conf.default.use_tempaddr = 0
  net.ipv6.conf.default.temp_valid_lft = 604800
  net.ipv6.conf.default.temp_prefered_lft = 86400
  net.ipv6.conf.default.regen_max_retry = 5
  net.ipv6.conf.default.max_desync_factor = 600
  net.ipv6.conf.default.max_addresses = 16
  net.ipv6.conf.default.accept_ra_defrtr = 1
  net.ipv6.conf.default.accept_ra_pinfo = 1
  net.ipv6.conf.default.proxy_ndp = 0
  net.ipv6.conf.default.accept_source_route = 0
  net.irda.discovery = 0
  net.irda.devname = Linux
  net.irda.debug = 0
  net.irda.fast_poll_increase = 50
  net.irda.discovery_slots = 6
  net.irda.discovery_timeout = 3
  net.irda.slot_timeout = 88
  net.irda.max_baud_rate = 16000000
  net.irda.min_tx_turn_time = 10
  net.irda.max_tx_data_size = 2042
  net.irda.max_tx_window = 7
  net.irda.max_noreply_time = 12
  net.irda.warn_noreply_time = 3
  net.irda.lap_keepalive_time = 2000
  fs.inode-nr = 43585	22790
  fs.inode-state = 43585	22790	0	0	0	0	0
  fs.file-nr = 6784	0	257082
  fs.file-max = 257082
  fs.dentry-state = 24500	15296	45	0	0	0
  fs.overflowuid = 65534
  fs.overflowgid = 65534
  fs.leases-enable = 1
  fs.dir-notify-enable = 1
  fs.lease-break-time = 45
  fs.aio-nr = 0
  fs.aio-max-nr = 65536
  fs.inotify.max_user_instances = 128
  fs.inotify.max_user_watches = 8192
  fs.inotify.max_queued_events = 16384
  fs.suid_dumpable = 0
  fs.binfmt_misc.sun-java6 = enabled
  fs.binfmt_misc.sun-java6 = interpreter /usr/lib/jvm/java-6-sun-1.6.0.03/jre/lib/jexec
  fs.binfmt_misc.sun-java6 = flags: 
  fs.binfmt_misc.sun-java6 = offset 0
  fs.binfmt_misc.sun-java6 = magic 504b0304
  fs.binfmt_misc.wine = enabled
  fs.binfmt_misc.wine = interpreter /usr/share/binfmt-support/run-detectors
  fs.binfmt_misc.wine = flags: 
  fs.binfmt_misc.wine = offset 0
  fs.binfmt_misc.wine = magic 4d5a
  fs.binfmt_misc.cli = enabled
  fs.binfmt_misc.cli = interpreter /usr/share/binfmt-support/run-detectors
  fs.binfmt_misc.cli = flags: 
  fs.binfmt_misc.cli = offset 0
  fs.binfmt_misc.cli = magic 4d5a
  fs.binfmt_misc.python2/5 = enabled
  fs.binfmt_misc.python2/5 = interpreter /usr/bin/python2.5
  fs.binfmt_misc.python2/5 = flags: 
  fs.binfmt_misc.python2/5 = offset 0
  fs.binfmt_misc.python2/5 = magic b3f20d0a
  fs.binfmt_misc.status = enabledfs.quota.lookups = 0
  fs.quota.drops = 0
  fs.quota.reads = 0
  fs.quota.writes = 0
  fs.quota.cache_hits = 0
  fs.quota.allocated_dquots = 0
  fs.quota.free_dquots = 0
  fs.quota.syncs = 19
  fs.quota.warnings = 1
  fs.mqueue.queues_max = 256
  fs.mqueue.msg_max = 10
  fs.mqueue.msgsize_max = 8192
  fs.nfs.nlm_grace_period = 0
  fs.nfs.nlm_timeout = 10
  fs.nfs.nlm_udpport = 0
  fs.nfs.nlm_tcpport = 0
  fs.nfs.nsm_use_hostnames = 0
  fs.nfs.nsm_local_state = 0
  dev.rtc.max-user-freq = 64
  dev.hpet.max-user-freq = 64
  dev.mac_hid.mouse_button_emulation = 0
  dev.mac_hid.mouse_button2_keycode = 97
  dev.mac_hid.mouse_button3_keycode = 100
  dev.scsi.logging_level = 0
  dev.parport.default.timeslice = 200
  dev.parport.default.spintime = 500
  dev.parport.parport0.spintime = 500
  dev.parport.parport0.base-addr = 888	1912
  dev.parport.parport0.irq = -1
  dev.parport.parport0.dma = -1
  dev.parport.parport0.modes = PCSPP,TRISTATE,COMPAT,ECP,DMA
  dev.parport.parport0.devices.active = none
  dev.parport.parport0.devices.lp.timeslice = 200
  dev.cdrom.info = CD-ROM information, Id: cdrom.c 3.20 2003/12/17
  dev.cdrom.info = 
  dev.cdrom.info = drive name:		sr0
  dev.cdrom.info = drive speed:		1
  dev.cdrom.info = drive # of slots:	1
  dev.cdrom.info = Can close tray:		1
  dev.cdrom.info = Can open tray:		1
  dev.cdrom.info = Can lock tray:		1
  dev.cdrom.info = Can change speed:	0
  dev.cdrom.info = Can select disk:	0
  dev.cdrom.info = Can read multisession:	1
  dev.cdrom.info = Can read MCN:		1
  dev.cdrom.info = Reports media changed:	1
  dev.cdrom.info = Can play audio:		1
  dev.cdrom.info = Can write CD-R:		0
  dev.cdrom.info = Can write CD-RW:	0
  dev.cdrom.info = Can read DVD:		0
  dev.cdrom.info = Can write DVD-R:	0
  dev.cdrom.info = Can write DVD-RAM:	0
  dev.cdrom.info = Can read MRW:		0
  dev.cdrom.info = Can write MRW:		0
  dev.cdrom.info = Can write RAM:		0
  dev.cdrom.info = 
  dev.cdrom.info = 
  dev.cdrom.autoclose = 1
  dev.cdrom.autoeject = 0
  dev.cdrom.debug = 0
  dev.cdrom.lock = 1
  dev.cdrom.check_media = 0
  sunrpc.rpc_debug = 0
  sunrpc.nfs_debug = 0
  sunrpc.nfsd_debug = 0
  sunrpc.nlm_debug = 0
  sunrpc.udp_slot_table_entries = 16
  sunrpc.tcp_slot_table_entries = 16
  sunrpc.min_resvport = 665
  sunrpc.max_resvport = 1023
  

• setup parameter
  • sysctl -w Variable=value
  • use /etc/sysctl.conf