Hi Everyone,
I need to install software that will change kernel parameters. If something goes wrong later, related with this changes, may be I will need to restore initial settings.
1. How do I check individually a kernel parameter (an example please)?
2. How do I display all kernel parameters at once?

Thanks in Advance.
Regards

I don't know if that's what you want, but you can check the relevant .config file in /boot directory - all the parameters for the kernel you are using are over there.

There's usually a .config file located in /usr/src/linux that has what configurations were used when the kernel was built.

Hi bsdunix,
I am an inexperienced linux user. Can you tell me how can I find this file from the command line? Step-by-step. I read that the file it`s usually hidden.

Thanks,
Kind Regards

The -a option shows everything including the dot .hidden files.

ls - list directory contents
http://linux.die.net/man/1/ls

find <path> -name <filename>

Example--to find .config in /usr:

find /usr -name .config

The location of the config file can vary from one distribution to another. On my Debian installation the config file is found in /boot. Its name is config followed by the kernel release number. To find it from the command line use:

ls -l /boot

One of the file names listed is config-2.6.18-5-486. I can list my config file with this command:

less /boot/config-2.6.18-5-486

If your distribution has installed the kernel source then you will find the config file in /usr/src/linux. You can use the ls and less commands to look for the config file in /usr/src/linux.

------------------------
Steve Stites

Most (all ???) binary distros don't ship the source tree. Most do provide the config in /boot. Else look for /proc/config.gz - (if provided) this is the config for the running system. Save that before you start.
Also check /proc/cmdline for boot-time overrides.

Hi again,
thanks for the help. Finally I found the file in question.
I wrote in the command line: find /usr -name .config
The problem now it`s the permission:

[root@localhost ~]# /usr/src/kernels/2.6.23.1-42.fc8-i686/.config
-bash: /usr/src/kernels/2.6.23.1-42.fc8-i686/.config: Permission denied

I just want to view default kernel parameters because they will change with the installation of a program. Will this file change after?
How can I view or edit the file if with root "powers" the permission remains denied?

Thanks in Advance.

You tried to execute the .config file. It's permissions are marked not executable because it isn't executable. You can display .config with:

less /usr/src/kernels/2.6.23.1-42.fc8-i686/.config

-----------------------------
Steve Stites

Hi.
less /usr/src/kernels/2.6.23.1-42.fc8-i686/.config
works to display the file.

The output is:
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.23.1-42.fc8
# Tue Oct 30 13:53:02 2007
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_QUICKLIST=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
:

It`s not complete because it`s very large, I don`t know how to select everything in the terminal and paste. I would like to know to also.
The problem it`s the initial one, I don`t recognize any kernel parameter displaying this file. I would like to check (if not all) at least:
semmsl, semmns,semopm,semmni,shmmax, shmmni, shmall, file-max, ip_local_port_range parameters.
Certainly with this file it`s not the proper way to do this, at least don`t seem to be.
Any suggestion it`s welcome. Please help me with this.

Regards.

The .config file is the kernel configuration file. Parameters can be displayed and set using sysctl.

Hi.
The output for: "sysctl -A" is:

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 = 47136 62848 94272
net.ipv4.tcp_wmem = 4096 16384 2011136
net.ipv4.tcp_rmem = 4096 87380 2011136
net.ipv4.tcp_app_win = 31
net.ipv4.tcp_adv_win_scale = 2
net.ipv4.icmp_ratelimit = 1000
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.cipso_cache_enable = 1
net.ipv4.cipso_cache_bucket_size = 10
net.ipv4.cipso_rbm_optfmt = 0
net.ipv4.cipso_rbm_strictvalid = 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 = 99
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 = 99
net.ipv4.neigh.default.proxy_delay = 79
net.ipv4.neigh.default.locktime = 99
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 = 99
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 = 99
net.ipv4.neigh.lo.proxy_delay = 79
net.ipv4.neigh.lo.locktime = 99
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 = 99
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 = 99
net.ipv4.neigh.eth0.proxy_delay = 79
net.ipv4.neigh.eth0.locktime = 99
net.ipv4.neigh.eth0.retrans_time_ms = 1000
net.ipv4.neigh.eth0.base_reachable_time_ms = 30000
net.ipv4.neigh.eth1.mcast_solicit = 3
net.ipv4.neigh.eth1.ucast_solicit = 3
net.ipv4.neigh.eth1.app_solicit = 0
net.ipv4.neigh.eth1.retrans_time = 99
net.ipv4.neigh.eth1.base_reachable_time = 30
net.ipv4.neigh.eth1.delay_first_probe_time = 5
net.ipv4.neigh.eth1.gc_stale_time = 60
net.ipv4.neigh.eth1.unres_qlen = 3
net.ipv4.neigh.eth1.proxy_qlen = 64
net.ipv4.neigh.eth1.anycast_delay = 99
net.ipv4.neigh.eth1.proxy_delay = 79
net.ipv4.neigh.eth1.locktime = 99
net.ipv4.neigh.eth1.retrans_time_ms = 1000
net.ipv4.neigh.eth1.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 = 1
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.default.accept_source_route = 0
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 = 1
net.ipv4.conf.eth0.send_redirects = 1
net.ipv4.conf.eth0.accept_source_route = 0
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.ipv4.conf.eth1.forwarding = 0
net.ipv4.conf.eth1.mc_forwarding = 0
net.ipv4.conf.eth1.accept_redirects = 1
net.ipv4.conf.eth1.secure_redirects = 1
net.ipv4.conf.eth1.shared_media = 1
net.ipv4.conf.eth1.rp_filter = 1
net.ipv4.conf.eth1.send_redirects = 1
net.ipv4.conf.eth1.accept_source_route = 0
net.ipv4.conf.eth1.proxy_arp = 0
net.ipv4.conf.eth1.medium_id = 0
net.ipv4.conf.eth1.bootp_relay = 0
net.ipv4.conf.eth1.log_martians = 0
net.ipv4.conf.eth1.tag = 0
net.ipv4.conf.eth1.arp_filter = 0
net.ipv4.conf.eth1.arp_announce = 0
net.ipv4.conf.eth1.arp_ignore = 0
net.ipv4.conf.eth1.arp_accept = 0
net.ipv4.conf.eth1.disable_xfrm = 0
net.ipv4.conf.eth1.disable_policy = 0
net.ipv4.conf.eth1.force_igmp_version = 0
net.ipv4.conf.eth1.promote_secondaries = 0
net.token-ring.rif_timeout = 600000
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 = 1
net.ipv6.route.gc_min_interval_ms = 500
net.ipv6.icmp.ratelimit = 1000
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.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 = 99
net.ipv6.neigh.default.proxy_delay = 79
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.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 = 99
net.ipv6.neigh.lo.proxy_delay = 79
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.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 = 99
net.ipv6.neigh.eth0.proxy_delay = 79
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.neigh.eth1.mcast_solicit = 3
net.ipv6.neigh.eth1.ucast_solicit = 3
net.ipv6.neigh.eth1.app_solicit = 0
net.ipv6.neigh.eth1.delay_first_probe_time = 5
net.ipv6.neigh.eth1.gc_stale_time = 60
net.ipv6.neigh.eth1.unres_qlen = 3
net.ipv6.neigh.eth1.proxy_qlen = 64
net.ipv6.neigh.eth1.anycast_delay = 99
net.ipv6.neigh.eth1.proxy_delay = 79
net.ipv6.neigh.eth1.locktime = 0
net.ipv6.neigh.eth1.retrans_time_ms = 1000
net.ipv6.neigh.eth1.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.accept_ra_rtr_pref = 1
net.ipv6.conf.lo.router_probe_interval = 60
net.ipv6.conf.lo.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.lo.proxy_ndp = 0
net.ipv6.conf.lo.accept_source_route = 0
net.ipv6.conf.lo.optimistic_dad = 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.accept_ra_rtr_pref = 1
net.ipv6.conf.eth0.router_probe_interval = 60
net.ipv6.conf.eth0.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.eth0.proxy_ndp = 0
net.ipv6.conf.eth0.accept_source_route = 0
net.ipv6.conf.eth0.optimistic_dad = 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.accept_ra_rtr_pref = 1
net.ipv6.conf.all.router_probe_interval = 60
net.ipv6.conf.all.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.all.proxy_ndp = 0
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.all.optimistic_dad = 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.accept_ra_rtr_pref = 1
net.ipv6.conf.default.router_probe_interval = 60
net.ipv6.conf.default.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.default.proxy_ndp = 0
net.ipv6.conf.default.accept_source_route = 0
net.ipv6.conf.default.optimistic_dad = 0
net.ipv6.conf.eth1.forwarding = 0
net.ipv6.conf.eth1.hop_limit = 64
net.ipv6.conf.eth1.mtu = 1500
net.ipv6.conf.eth1.accept_ra = 1
net.ipv6.conf.eth1.accept_redirects = 1
net.ipv6.conf.eth1.autoconf = 1
net.ipv6.conf.eth1.dad_transmits = 1
net.ipv6.conf.eth1.router_solicitations = 3
net.ipv6.conf.eth1.router_solicitation_interval = 4
net.ipv6.conf.eth1.router_solicitation_delay = 1
net.ipv6.conf.eth1.force_mld_version = 0
net.ipv6.conf.eth1.use_tempaddr = 0
net.ipv6.conf.eth1.temp_valid_lft = 604800
net.ipv6.conf.eth1.temp_prefered_lft = 86400
net.ipv6.conf.eth1.regen_max_retry = 5
net.ipv6.conf.eth1.max_desync_factor = 600
net.ipv6.conf.eth1.max_addresses = 16
net.ipv6.conf.eth1.accept_ra_defrtr = 1
net.ipv6.conf.eth1.accept_ra_pinfo = 1
net.ipv6.conf.eth1.accept_ra_rtr_pref = 1
net.ipv6.conf.eth1.router_probe_interval = 60
net.ipv6.conf.eth1.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.eth1.proxy_ndp = 0
net.ipv6.conf.eth1.accept_source_route = 0
net.ipv6.conf.eth1.optimistic_dad = 0
net.netfilter.nf_conntrack_generic_timeout = 600
net.netfilter.nf_conntrack_max = 32768
net.netfilter.nf_conntrack_count = 16
net.netfilter.nf_conntrack_buckets = 8192
net.netfilter.nf_conntrack_checksum = 1
net.netfilter.nf_conntrack_log_invalid = 0
net.netfilter.nf_conntrack_expect_max = 128
net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 120
net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 60
net.netfilter.nf_conntrack_tcp_timeout_established = 432000
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
net.netfilter.nf_conntrack_tcp_timeout_last_ack = 30
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_close = 10
net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 300
net.netfilter.nf_conntrack_tcp_loose = 1
net.netfilter.nf_conntrack_tcp_be_liberal = 0
net.netfilter.nf_conntrack_tcp_max_retrans = 3
net.netfilter.nf_conntrack_udp_timeout = 30
net.netfilter.nf_conntrack_udp_timeout_stream = 180
net.netfilter.nf_conntrack_icmpv6_timeout = 30
net.netfilter.nf_conntrack_frag6_timeout = 60
net.netfilter.nf_conntrack_frag6_low_thresh = 196608
net.netfilter.nf_conntrack_frag6_high_thresh = 262144
net.netfilter.nf_conntrack_icmp_timeout = 30
net.nf_conntrack_max = 32768
fs.inode-nr = 8417 1542
fs.inode-state = 8417 1542 0 0 0 0 0
fs.file-nr = 5184 0 48751


fs.file-max = 48751


fs.dentry-state = 7456 3055 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.default_relatime = 1
fs.relatime_interval = 86400
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 = 23
fs.quota.warnings = 1
fs.mqueue.queues_max = 256
fs.mqueue.msg_max = 10
fs.mqueue.msgsize_max = 8192
debug.exception-trace = 1
dev.raid.speed_limit_min = 1000
dev.raid.speed_limit_max = 200000
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.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: 24
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: 1
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: 1
dev.cdrom.info = Can write CD-RW: 1
dev.cdrom.info = Can read DVD: 1
dev.cdrom.info = Can write DVD-R: 1
dev.cdrom.info = Can write DVD-RAM: 1
dev.cdrom.info = Can read MRW: 0
dev.cdrom.info = Can write MRW: 0
dev.cdrom.info = Can write RAM: 1
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



Like I posted before before I am interested in semmsl, semmns,semopm,semmni,shmmax, shmmni, shmall, file-max, ip_local_port_range parameters, the only one listed here it`s file-max!
I don`t think it`s safe to change the settings of that parameters without a backup of the default values.
1. How do I check them properly?
2. How do I perform a backup? copy&paste or exists another process?

Thanks in Advance,
Regards

Use grep to filter output. For example:
Redirect output to a file for backup.
Changes made are lost with next reboot, to make them stick put them in /etc/sysctl.conf.

The answer to your questions is to use a utility script called menuconf. Menuconf is designed to set up the .config file for a kernel compile, display it, save and restore it, etc. The instructions for menuconf can be found in a file called README which should be located in /usr/src/kernels/2.6.23.1-42.fc8-i686.

----------------------
Steve Stites