SYSCTL(8)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System Administration\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SYSCTL(8)<\/p>\n
NAME\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
sysctl – configure kernel parameters at runtime<\/p>\n
SYNOPSIS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
sysctl [options] [variable[=value]] […]
\nsysctl -p [file or regexp] […]<\/p>\n
DESCRIPTION\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
sysctl is used to modify kernel parameters at runtime.\u00a0 The
\nparameters available are those listed under \/proc\/sys\/.\u00a0 Procfs is
\nrequired for sysctl support in Linux.\u00a0 You can use sysctl to both
\nread and write sysctl data.<\/p>\n
PARAMETERS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
variable
\nThe name of a key to read from.\u00a0 An example is kernel.ostype.
\nThe ‘\/’ separator is also accepted in place of a ‘.’.<\/p>\n
variable=value
\nTo set a key, use the form variable=value where variable is
\nthe key and value is the value to set it to.\u00a0 If the value
\ncontains quotes or characters which are parsed by the shell,
\nyou may need to enclose the value in double quotes.\u00a0 This
\nrequires the -w parameter to use.<\/p>\n
-n, –values
\nUse this option to disable printing of the key name when
\nprinting values.<\/p>\n
-e, –ignore
\nUse this option to ignore errors about unknown keys.<\/p>\n
-N, –names
\nUse this option to only print the names.\u00a0 It may be useful
\nwith shells that have programmable completion.<\/p>\n
-q, –quiet
\nUse this option to not display the values set to stdout.<\/p>\n
-w, –write
\nUse this option when you want to change a sysctl setting.<\/p>\n
-p[FILE], –load[=FILE]
\nLoad in sysctl settings from the file specified or
\n\/etc\/sysctl.conf if none given.\u00a0 Specifying – as filename
\nmeans reading data from standard input.\u00a0 Using this option
\nwill mean arguments to sysctl are files, which are read in the
\norder they are specified.\u00a0 The file argument may be specified
\nas regular expression.<\/p>\n
-a, –all
\nDisplay all values currently available.<\/p>\n
–deprecated
\nInclude deprecated parameters to –all values listing.<\/p>\n
-b, –binary
\nPrint value without new line.<\/p>\n
–system
\nLoad settings from all system configuration files.
\n\/run\/sysctl.d\/*.conf
\n\/etc\/sysctl.d\/*.conf
\n\/usr\/local\/lib\/sysctl.d\/*.conf
\n\/usr\/lib\/sysctl.d\/*.conf
\n\/lib\/sysctl.d\/*.conf
\n\/etc\/sysctl.conf<\/p>\n
-r, –pattern pattern
\nOnly apply settings that match pattern.\u00a0 The pattern uses
\nextended regular expression syntax.<\/p>\n
-A\u00a0\u00a0\u00a0\u00a0 Alias of -a<\/p>\n
-d\u00a0\u00a0\u00a0\u00a0 Alias of -h<\/p>\n
-f\u00a0\u00a0\u00a0\u00a0 Alias of -p<\/p>\n
-X\u00a0\u00a0\u00a0\u00a0 Alias of -a<\/p>\n
-o\u00a0\u00a0\u00a0\u00a0 Does nothing, exists for BSD compatibility.<\/p>\n
-x\u00a0\u00a0\u00a0\u00a0 Does nothing, exists for BSD compatibility.<\/p>\n
-h, –help
\nDisplay help text and exit.<\/p>\n
-V, –version
\nDisplay version information and exit.<\/p>\n
EXAMPLES\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
\/sbin\/sysctl -a
\n\/sbin\/sysctl -n kernel.hostname
\n\/sbin\/sysctl -w kernel.domainname=”example.com”
\n\/sbin\/sysctl -p\/etc\/sysctl.conf
\n\/sbin\/sysctl -a –pattern forward
\n\/sbin\/sysctl -a –pattern forward$
\n\/sbin\/sysctl -a –pattern ‘net.ipv4.conf.(eth|wlan)0.arp’
\n\/sbin\/sysctl –system –pattern ‘^net.ipv6’<\/p>\n
DEPRECATED PARAMETERS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
The base_reachable_time and retrans_time are deprecated.\u00a0 The sysctl
\ncommand does not allow changing values of these parameters.\u00a0 Users
\nwho insist to use deprecated kernel interfaces should push values to
\n\/proc file system by other means.\u00a0 For example:<\/p>\n
echo 256 > \/proc\/sys\/net\/ipv6\/neigh\/eth0\/base_reachable_time<\/p>\n
FILES\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
\/proc\/sys
\n\/etc\/sysctl.conf<\/p>\n
SEE ALSO\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
sysctl.conf(5) regex(7)<\/p>\n
AUTHOR\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
George Staikos \u27e8staikos@0wned.org\u27e9<\/p>\n
REPORTING BUGS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
Please send bug reports to \u27e8procps@freelists.org\u27e9<\/p>\n
COLOPHON\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top<\/p>\n
This page is part of the procps-ng (\/proc filesystem utilities)
\nproject.\u00a0 Information about the project can be found at
\n\u27e8http:\/\/sourceforge.net\/projects\/procps-ng\/\u27e9.\u00a0 If you have a bug
\nreport for this manual page, see
\n\u27e8http:\/\/sourceforge.net\/p\/procps-ng\/tickets\/\u27e9.\u00a0 This page was obtained
\nfrom the project’s upstream Git repository
\n(https:\/\/gitorious.org\/procps) on 2014-12-30.\u00a0 If you discover any
\nrendering problems in this HTML version of the page, or you believe
\nthere is a better or more up-to-date source for the page, or you have
\ncorrections or improvements to the information in this COLOPHON
\n(which is not part of the original manual page), send a mail to
\nman-pages@man7.org<\/p>\n
procps-ng\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Jan 2012\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SYSCTL(8)<\/p>\n","protected":false},"excerpt":{"rendered":"
SYSCTL(8)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System Administration\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SYSCTL(8) NAME\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top sysctl – configure kernel parameters at runtime SYNOPSIS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top sysctl [options] [variable[=value]] […] sysctl -p [file or regexp] […] DESCRIPTION\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 top sysctl is used to modify kernel parameters at runtime.\u00a0 The parameters available are those listed under \/proc\/sys\/.\u00a0 Procfs is required for sysctl support in Linux.\u00a0 You can use […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-361","post","type-post","status-publish","format-standard","hentry","category-shell"],"a3_pvc":{"activated":false,"total_views":0,"today_views":0},"_links":{"self":[{"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=\/wp\/v2\/posts\/361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=361"}],"version-history":[{"count":0,"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=\/wp\/v2\/posts\/361\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linuxboxen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}