参考文献

hosts

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cat -n /etc/hosts

hostname

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cat /etc/hostname

  • 查看ip地址

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    hostname --ip-address

    hostname -I

黑白名单

  • /etc/hosts.allow 白名单

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    # /etc/hosts.allow: list of hosts that are allowed to access the system.
    #                   See the manual pages hosts_access(5) and hosts_options(5).
    #
    # Example:    ALL: LOCAL @some_netgroup
    #             ALL: .foobar.edu EXCEPT terminalserver.foobar.edu
    #
    # If you're going to protect the portmapper use the name "rpcbind" for the
    # daemon name. See rpcbind(8) and rpc.mountd(8) for further information.
    #

  • /etc/hosts.deny 黑名单

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    # /etc/hosts.deny: list of hosts that are _not_ allowed to access the system.
    #                  See the manual pages hosts_access(5) and hosts_options(5).
    #
    # Example:    ALL: some.host.name, .some.domain
    #             ALL EXCEPT in.fingerd: other.host.name, .other.domain
    #
    # If you're going to protect the portmapper use the name "rpcbind" for the
    # daemon name. See rpcbind(8) and rpc.mountd(8) for further information.
    #
    # The PARANOID wildcard matches any host whose name does not match its
    # address.
    #
    # You may wish to enable this to ensure any programs that don't
    # validate looked up hostnames still leave understandable logs. In past
    # versions of Debian this has been the default.
    # ALL: PARANOID

/etc/resolv.conf

  • DNS解析文件

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    # This file is managed by man:systemd-resolved(8). Do not edit.
    #
    # This is a dynamic resolv.conf file for connecting local clients to the
    # internal DNS stub resolver of systemd-resolved. This file lists all
    # configured search domains.
    #
    # Run "systemd-resolve --status" to see details about the uplink DNS servers
    # currently in use.
    #
    # Third party programs must not access this file directly, but only through the
    # symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
    # replace this symlink by a static file or a different symlink.
    #
    # See man:systemd-resolved.service(8) for details about the supported modes of
    # operation for /etc/resolv.conf.

    nameserver 127.0.0.53
    options edns0
    search lan

ethtool

  • 用于查询和更改以太网接口驱动程序和硬件参数的命令行工具
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# ethtool  eno1
Settings for eno1:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Half 1000baseT/Full
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Half 1000baseT/Full
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full
	                                     100baseT/Half 100baseT/Full
	                                     1000baseT/Full
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 1000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 1
	Transceiver: internal
	Auto-negotiation: on
	MDI-X: off
	Supports Wake-on: g
	Wake-on: d
	Current message level: 0x000000ff (255)
			       drv probe link timer ifdown ifup rx_err tx_err
	Link detected: yes