linux培训系列第七讲

rrktqtLinuxLinuxTCP/IPLinuxinetdxinetdLinuxLinuxLinuxLinuxLinux:Linux://rrktqt.discuz.net1/542007-01-28PoweredbyX-SpacerrktqtLinuxTCP/IPTCP/IPTCP/IPIPIPifconfig-aTCP/IPDNSinetdinetd/etc/servicesinetd/etc/inetd.confinetdinetdTCPTCPTCPTCPxinetdinetdxinetdrootSUID/SGIDulimitulimitCPUiptablesipchainsiptablesLinuxsyslogtripwireportsentrylpd/etc/printcap://rrktqt.discuz.net3/542007-01-28PoweredbyX-SpacerrktqtLinuxTCP/IPTCP/IP:2007-01-2811:42:17LinuxLANLinuxTCP/IPLAN:2007-01-2811:42:49LANLinuxTCP/IPTCP/IP:2007-01-2811:43:17LANTCP/IPLAN00:01:02:CB:57:3C:2007-01-2811:43:49LANTCP/IPIPIP192.168.1.1:2007-01-2811:44:20LANTCP/IPIPLinuxIPLinuxifconfigeth0192.168.1.1broadcast192.168.1.255netmask255.255.255.0ifconfigeth0eth0192.168.1.1IPIP192.168.1.255255.255.255.0eth0IP:2007-01-2811:44:57ifconfig-aeth0Linkencap:EthernetHWaddr00:01:02:CB:57:3Cinetaddr:192.168.1.1Bcast:192.168.1.255Mask:255.255.255.0UPBROADCASTRUNNINGMULTICASTMTU:1500Metric:1RXpackets:0errors:0dropped:0overruns:0frame:0TXpackets:0errors:0dropped:0overruns:0carrier:0collisions:0txqueuelen:100RXbytes:0(0.0b)TXbytes:0(0.0b)Interrupt:5Baseaddress:0xc400loLinkencap:LocalLoopbackinetaddr:127.0.0.1Mask:255.0.0.0UPLOOPBACKRUNNINGMTU:16436Metric:1RXpackets:1065errors:0dropped:0overruns:0frame:0TXpackets:1065errors:0dropped:0overruns:0carrier:0collisions:0txqueuelen:0RXbytes:262542(256.3Kb)TXbytes:262542(256.3Kb)eth0lolocalhostloTCP/IP:2007-01-2811:45:25IPTCP/IPLANIPpingtelnetssh:2007-01-2811:45:55ping192.168.1.1pingmyboxLinux/etc/hostsIPIP/etc/hosts127.0.0.1localhost192.168.1.1myboxmybox.gentoo.org192.168.1.2testboxtestbox.gentoo.org192.168.1.3mailboxmailbox.gentoo.org/etc/hostslocalhost127.0.0.1IPLANmyboxmybox.gentoo.org/etc/hostsIPpingmybox:2007-01-2811:46:26LANLANIPDNSIP/etc/resolv.confdomaingentoo.orgnameserver192.168.1.1nameserver192.168.1.2/etc/resolv.conftestbox.gentoo.orgtestbox192.168.1.1DNS192.168.1.2LinuxPCresolv.confLANDNSIPWebibm.comIP:2007-01-2811:46:563LANDSLT1IPLANLANLANLANrouteadd-netdefaultgw192.168.1.80netmask0.0.0.0metric1route192.168.1.80IProute-n0.0.0.0:2007-01-2811:47:47Linuxtelnettelnetftpftp/usr/sbin/in.telnetd/usr/sbin/in.ftpdinetdinetdinetdLinuxinetdsshdlpdinetd:2007-01-2811:48:25inetdTCP/IPinetdTCPUDP/etc/protocolsinetdservice-nameport-number/protocol-namealiases#comment#grep^[^#]/etc/services|head-5tcpmux1/tcp#TCPportservicemultiplexerecho7/tcpecho7/udpdiscard9/tcpsinknulldiscard9/udpsinknull/etc/services:2007-01-2811:48:59inetd/etc/inetd.confservice-namesocket-typeprotocolwait-flaguserserver-programinetd.confinetd/etc/services/etc/inetd.conftelnetftp#grep^telnet/etc/inetd.conftelnetstreamtcpnowaitroot/usr/sbin/in.telnetd#grep^ftp/etc/inetd.confftpstreamtcpnowaitroot/usr/sbin/in.ftpd-l-aTCProotin.telnetdin.ftpd/etc/inetd.confinetd(8):2007-01-2811:49:31inetd/etc/inetd.conftelnet#vi/etc/inetd.conf[commentoutundesiredline]#grep^.telnet/etc/inetd.conf#telnetstreamtcpnowaitroot/usr/sbin/in.telnetd:2007-01-2811:50:06/etc/inetd.confinetd/etc/init.d/etc/rc.d/init.d#/etc/rc.d/init.d/inetstopStoppingINETservices:[OK]#/etc/rc.d/init.d/inetstartStartingINETservices:[OK]restart#/etc/rc.d/init.d/inetrestartStoppingINETservices:[OK]StartingINETservices:[OK]:2007-01-2811:50:44killallinetd#killallinetdinetd#/usr/sbin/inetdinetdHUP#killall-HUPinetdtelnetftptelnetftptelnetlocalhosttelnetftp#telnetlocalhosttelnet:Unabletoconnecttoremotehost:Connectionrefused:2007-01-2811:51:14tcp_wrapperstcpdinetdtcpdtcpdinetdftpstreamtcpnowaitroot/usr/sbin/tcpdin.ftpd-l-atelnetstreamtcpnowaitroot/usr/sbin/tcpdin.telnetd:2007-01-2811:51:45inetd#telnetlocalhostlogin:(pressctrl-dtoab