SYSCTL(8)                Administracao do sistema                    SYSCTL(8)

NOME
       sysctl - configura parametros do kernel em tempo de execucao

SINOPSE
       sysctl [opcoes] [variavel[=valor]] [...]
       sysctl -p [arquivo ou regexp] [...]

DESCRICAO
       sysctl is used to modify kernel parameters at runtime.  The parameters
       available are those listed under /proc/sys/.  Procfs is required for
       sysctl support in Linux.  You can use sysctl to both read and write
       sysctl data.

PARAMETROS
       variavel
              O nome da chave a ser lida (p. ex., kernel.ostype). O separador
              "/" tambem e aceito no lugar de um ".".

       variavel=valor
              Para definir uma chave, use a forma variavel=valor, sendo
              variavel a chave e valor o valor para configura-la. Se o valor
              contiver aspas ou os caracteres que sao analisados pelo shell,
              talvez seja necessario incluir o valor entre aspas duplas.

       -n, --values
              Use essa opcao para desabilitar impressao do nome da chave ao
              imprimir valores.

       -e, --ignore
              Use essa opcao para ignorar erros sobre as chaves desconhecidas.

       -N, --names
              Use esta opcao para exibir apenas os nomes. Pode ser util com
              shells que tenham um completamento programavel.

       -q, --quiet
              Use essa opcao para nao exibir os valores definidos para stdout
              (saida padrao).

       -w, --write
              Force all arguments to be write arguments and print an error if
              they cannot be parsed this way.

       -p[ARQUIVO], --load[=ARQUIVO]
              Load in sysctl settings from the file specified or
              /etc/sysctl.conf if none given.  Specifying - as filename means
              reading data from standard input. Using this option will mean
              arguments to sysctl are files, which are read in the order they
              are specified.  The file argument may be specified as regular
              expression.

       -a, --all
              Exibe todos os valores disponiveis atualmente.

       --deprecated
              Inclui parametros obsoletos para listagem de valores de --all.

       -b, --binary
              Exibe valor sem nova linha.

       --system
              Load settings from all system configuration files. See the
              SYSTEM FILE PRECEDENCE section below.

       -r, --pattern padrao
              So aplica configuracoes que corresponderem ao padrao. O padrao
              usa a sintaxe de expressao regular estendidas.

       -A     Apelido de -a

       -d     Apelido de -h

       -f     Apelido de -p

       -X     Apelido de -a

       -o     Faz nada, existe para compatibilidade com BSD.

       -x     Faz nada, existe para compatibilidade com BSD.

       -h, --help
              Exibe um texto de ajuda e sai.

       -V, --version
              Exibe informacao da versao e sai.

SYSTEM FILE PRECEDENCE
       When using the --system option, sysctl will read files from directories
       in the following list in given order from top to bottom. Once a file of
       a given filename is loaded, any file of the same name in subsequent
       directories is ignored.

       /etc/sysctl.d/*.conf
       /run/sysctl.d/*.conf
       /usr/local/lib/sysctl.d/*.conf
       /usr/lib/sysctl.d/*.conf
       /lib/sysctl.d/*.conf
       /etc/sysctl.conf

       All configuration files are sorted in lexicographic order, regardless
       of the directory they reside in. Configuration files can either be
       completely replaced (by having a new configuration file with the same
       name in a directory of higher priority) or partially replaced (by
       having a configuration file that is ordered later).

EXEMPLOS
       /sbin/sysctl -a
       /sbin/sysctl -n kernel.hostname
       /sbin/sysctl -w kernel.domainname="example.com"
       /sbin/sysctl -p/etc/sysctl.conf
       /sbin/sysctl -a --pattern forward
       /sbin/sysctl -a --pattern forward$
       /sbin/sysctl -a --pattern 'net.ipv4.conf.(eth|wlan)0.arp'
       /sbin/sysctl --pattern '^net.ipv6' --system

PARAMETROS OBSOLETOS
       The base_reachable_time and retrans_time are deprecated.  The sysctl
       command does not allow changing values of these parameters.  Users who
       insist to use deprecated kernel interfaces should push values to /proc
       file system by other means.  For example:

       echo 256 > /proc/sys/net/ipv6/neigh/eth0/base_reachable_time

ARQUIVOS
       /proc/sys
       /etc/sysctl.d/*.conf
       /run/sysctl.d/*.conf
       /usr/local/lib/sysctl.d/*.conf
       /usr/lib/sysctl.d/*.conf
       /lib/sysctl.d/*.conf
       /etc/sysctl.conf

VEJA TAMBEM
       proc(5), sysctl.conf(5), regex(7)

AUTOR
       George Staikos <staikos@0wned.org>

RELATANDO ERROS
       Por favor, envie relatorios de erros para <procps@freelists.org>

procps-ng                         2023-08-19                         SYSCTL(8)