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ÈíÑ¶ÍøÂç > ²Ù×÷ϵͳ > Linux > Linux Quick Fix Notebookѧϰժ¼(Ò»)
¡¾±ê  Ìâ¡¿£ºLinux Quick Fix Notebookѧϰժ¼(Ò»)
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¡¾À´  Ô´¡¿£ºhttp://blog.chinaunix.net/article.php?articleId=59143&blogId=11758

Linux Quick Fix Notebookѧϰժ¼(һ)

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Linux Quick Fix Notebook(linux ¿ìËÙάÐÞÊÖ²á)ÊÇÓÉPeter Harrison±àд£¬Óɳö°æµÄÕë¶ÔLinux¹¤³ÌʦµÄÊֲᡣ×÷ÕßµÄд×÷Ä¿µÄÊǽâ¾öÔÚÈÕ³£linuxÓ¦Óùý³ÌÖо­³£³öÏÖÎÊÌâΪĿ±ê£¬Òò´ËÕë¶ÔÐԱȽÏÇ¿¡£Õâ±¾Êé²»½ö¿ÉÒÔÔÚÄúµÄ·þÎñÆ÷³öÏÖÎÊÌâʱ¸øÄú°ïÖú£¬Í¬Ñù¶ÔÓÚ³õѧºÍÖм¶Ñ§ÕßÀ´ËµÒ²ÊÇÒ»±¾²»´íµÄ½Ì²Ä¡£

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linux help

linuxµÄ°ïÖúÎļþÊÇͨ¹ýmanÃüÁî»òÕß°ïÖúÊÖ²á(manual pages)À´·ÃÎÊ¡£ÔÚÃüÁîÐиñʽÏ¿ÉÒÔʹÓÃÔÚmanÃüÁîºó¸úÏàÓ¦µÄÎļþÃûÀ´µÃµ½ÄãÏëµÃµ½µÄ°ïÖúÐÅÏ¢¡£±ÈÈçÈç¹ûÄãÏëµÃµ½¹ØÓÚsshÃüÁîµÄ°ïÖúÐÅÏ¢£¬Äã¿ÉÒÔʹÓÃÈçÏÂÃüÁman ssh

[root@bigboy tmp]# man ssh

Èç¹ûÄãÏëͨ¹ý¹Ø¼ü×ÖÀ´²éÕÒ°ïÖúÊֲᣬÄã¿ÉÒÔÔÚmanºó±ß¸ú-k²ÎÊýÀ´Ö´ÐУ¬±ÈÈç¡°man -k ssh¡±£¬½«»á¸øÄãÒ»¸öËùÓаüº¬ssh¹Ø¼ü×ÖÃüÁîµÄman pages£º
      [root@bigboy tmp]# man -k ssh
      ...
      ...
      ssh                     (1)  - OpenSSH SSH client (remote login program)
      ssh [slogin]            (1)  - OpenSSH SSH client (remote login program)
      ssh-agent               (1)  - authentication agent
      ssh-keyscan             (1)  - gather ssh public keys
      ssh_config              (5)  - OpenSSH SSH client configuration files
      sshd                    (8)  - OpenSSH SSH daemon
      sshd_config             (5)  - OpenSSH SSH daemon configuration file
      ...
      ...
      [root@bigboy tmp]#

 

µÚÈýÕÂ linux ÍøÂç

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ÕâÒ»Õ¸æËßÄãÈçºÎ¼ò±ãµÄÅäÖ÷þÎñÆ÷µÄIPµØÖ·ÒÔ¼°Ïà¹ØµÄ²Ù×÷¡£

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´ó¶àÊýÏÖ´úµÄPC»ú¶¼ÓÐÒÔÌ«Íø¿Ú¡£µ±Linux±»°²×°ºó£¬Õâ¸öÒÔÌ«¿ÚµÄÃû³ÆÎªeth0¡£Äã¿ÉÒÔͨ¹ýifconfigÃüÁîÀ´»ñÈ¡£º
    [root@bigboy tmp]# ifconfig -a

     eth0 Link encap:Ethernet HWaddr 00:08:C7:10:74:A8
     BROADCAST MULTICAST MTU:1500 Metric:1
     RX packets:0 errors:0 dropped:0 overruns:0 frame:0
     TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:100
     RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
     Interrupt:11 Base address:0x1820

     lo Link encap:Local Loopback
     inet addr:127.0.0.1 Mask:255.0.0.0
     UP LOOPBACK RUNNING MTU:16436 Metric:1
     RX packets:787 errors:0 dropped:0 overruns:0 frame:0
     TX packets:787 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0
     RX bytes:82644 (80.7 Kb) TX bytes:82644 (80.7 Kb)

     wlan0 Link encap:Ethernet HWaddr 00:06:25:09:6A:B5
     inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:47379 errors:0 dropped:0 overruns:0 frame:0
     TX packets:107900 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:100
     RX bytes:4676853 (4.4 Mb) TX bytes:43209032 (41.2 Mb)
     Interrupt:11 Memory:c887a000-c887b000

     wlan0:0 Link encap:Ethernet HWaddr 00:06:25:09:6A:B5
     inet addr:192.168.1.99 Bcast:192.168.1.255 Mask:255.255.255.0
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     Interrupt:11 Memory:c887a000-c887b000


     [root@bigboy tmp]#

ÔÚÕâ¸öÀý×Óµ±ÖУ¬eth0ûÓÐIPµØÖ·Ó¦ÎªÕą̂»úÆ÷ʹÓö˿Úwlan0×öΪÖ÷ÒªµÄ¶Ë¿Ú¡£wlan0ÅäÖõÄipµØÖ·Îª192.168.1.100,×ÓÍøÑÚÂëΪ255.255.255.0¡£

Äã¿ÉÒÔ¿´µ½Õâ¸öÃüÁîºÜºÃµØ¸ø³öÿһ¸ö½Ó¿Ú¿¨µÄÖжϡ¢»òÕßPCIµÄ×ÜÏßID(PCI bus ID)¡£ÔÚÌØÊâÇé¿öÏÂÄã»á·¢ÏÖÄãµÄNICÎÞ·¨¹¤×÷µÄÔ­ÒòÊÇÄãµÄÍø¿¨ÖжÏÐÅÏ¢ºÍÄÚ´æ½øÈëµØÖ·(memory access address)ÓëÆäËûÉ豸³åÍ»¡£Äã¿ÉÒÔͨ¹ý/proc/interruptsÎļþÀ´»ñ֪ϵͳÖÐËùÓеÄÖжÏÐÅÏ¢¡£ÔÚϱߵÄÀý×ÓÖÐÄãÄܹ»¿´µ½IRQ´Ó0µ½15»¥ÏàÖ®¼ä¶¼Ã»ÓгåÍ»(conflicts)¡£É豸eth0ºÍeth1·Ö±ðʹÓò»Í¬µÄÖжϺÅ5ºÍ10¡£

      [root@bigboy tmp]# cat /proc/interrupts
                CPU0
       0: 2707402473          XT-PIC  timer
       1:         67          XT-PIC  i8042
       2:          0          XT-PIC  cascade
       5:     411342          XT-PIC  eth1
       8:          1          XT-PIC  rtc
      10:    1898752          XT-PIC  eth0
      11:          0          XT-PIC  uhci_hcd
      12:         58          XT-PIC  i8042
      14:    5075806          XT-PIC  ide0
      15:        506          XT-PIC  ide1
     NMI:          0
     ERR:         43
     [root@bigboy tmp]#

Èç¹û´æÔÚ³åÍ»£¬Äã¿ÉÒÔͨ¹ý²éÕÒÎÊÌâÉ豸µÄÊÖ²áÀ´È·¶¨ÈçºÎ·ÖÅ䏸ËûÒ»¸öÆäËûµÄÖжϻòÄÚ´æI/OµØÖ·¡£

¸Ä±äÄãµÄIPµØÖ·


Èç¹ûÐèÒªÄã¿ÉÒÔͨ¹ýifconfigÃüÁîÀ´¸Ä±äeth0µÄipµØÖ·£º

     [root@bigboy tmp]# ifconfig eth0 10.0.0.1 netmask 255.255.255.0 up

ÔÚÃüÁîºó±ßµÄ"up"ÊÇÓÃÀ´¼¤»î(active)Íø¿¨µÄ²ÎÊý¡£Èç¹ûÏ£ÍûÔÚÿ´ÎÆô¶¯Ê±¶¼Ö´ÐиÃÃüÁÄú¿ÉÒÔ°ÑÕâÌõÃüÁîÌí¼ÓÔÚ/etc/rc.localÎļþÖУ¬´ËÎļþÖеÄÃüÁî»áÔÚÿ´ÎÆô¶¯µÄ×îºóÔËÐС£
Fedora LinuxͬÑùÓÐÒ»¸öÉÔ·½±ãһЩµÄÅäÖÃÎļþ·ÅÖÃÔÚ/etc/sysconfig/network-scriptsĿ¼Ï¡£¶Ë¿Úeth0µÄÅäÖÃÎļþΪifcfg-eth0,eth1ʹÓÃifcfg-eth1,ÒÔ´ËÀàÍÆ¡£Äã¿ÉÒÔ°ÑÄãµÄIPµØÖ·µÄÐÅÏ¢ÅäÖÃÔÚÒÔÉÏÕâЩÎļþÖУ¬ÕâЩÎļþÔÚÿ´ÎÆô¶¯Ê±»á×Ô¶¯ÅäÖÃÄãµÄÍø¿¨¡£Figure3.1¾ÍÊÇÁ½¸ö¶Ë¿Úeth0µÄÀý×Ó¡£Ò»¸öÊǼÙÉè¶Ë¿ÚʹÓù̶¨µÄIPµØÖ·£¬ÁíÍâÒ»¸öÐèÒª¶Ë¿Úͨ¹ýDHCP»ñµÃIPµØÖ·¡£
Figure 3.1. File formats for network-scripts. Fixed IP Address
 
 [root@bigboy tmp]# cd /etc/sysconfig/network-scripts

 [root@bigboy network-scripts]# less ifcfg-eth0

 DEVICE=eth0

 IPADDR=192.168.1.100

 NETMASK=255.255.255.0

 BOOTPROTO=static

 ONBOOT=yes

 #

 # The following settings are optional

 #

 BROADCAST=192.168.1.255

 NETWORK=192.168.1.0

 [root@bigboy network-scripts]#

 

Getting the IP Address Using DHCP
 
 [root@bigboy tmp]# cd /etc/sysconfig/network-scripts

 [root@bigboy network-scripts]# less ifcfg-eth0

 DEVICE=eth0

 BOOTPROTO=dhcp

 ONBOOT=yes

 [root@bigboy network-scripts]#

 
¾ÍÏñÄú¿´µ½µÄ£¬eth0½«»áÔÚÆô¶¯Ê±¼¤»î£¬ÒòΪ²ÎÊýONBOOTºóµÄֵΪyes¶ø²»ÊÇno¡£

ĬÈϵÄred hat/FedoraµÄ°²×°½«»á°üº¬broadcastºÍnetworkÑ¡ÏîÔÚnetwork-scriptsÎļþ¡£ËûÃÇÊÇ¿ÉÑ¡ÔñµÄ¡£

ÔÚÄú¸ü¸ÄÍêÍø¿¨ÅäÖÃÎļþµÄÖµºó£¬Äã±ØÐëÍê³É½ûÓúͼ¤»îµÄ²Ù×÷ºó£¬ÅäÖòÅÄÜÉúЧ¡£ifdownºÍifupÃüÁî¿ÉÒÔÓÃÀ´×öÈçϲÙ×÷£º

     [root@bigboy network-scripts]# ifdown eth0
     [root@bigboy network-scripts]# ifup eth0

ÄãµÄ·þÎñÆ÷±ØÐëµÃÒªÒ»¸öĬÈÏÍø¹Ø²ÅÄÜÓ뻥ÁªÍø»¥Í¨¡£ÈçºÎÅäÖý«»áÔÚϱߵÄÕ½ÚÖÐÏêÊö¡£

DHCPÊÇÈçºÎÓ°ÏìDNS·þÎñÆ÷µÄÉèÖõÄ
ÄãµÄDHCP·þÎñÆ÷²»Ö»·ÖÅ䏸Äã·þÎñÆ÷IPµØÖ·£¬Í¬ÑùÖ¸¶¨DNS·þÎñÆ÷¡£±£Ö¤ÄãµÄ/etc/resolv.confÎļþÓйØÓÚserversµÄÅäÖÃÐб»×¢ÊÍ£¬·ñÔò½«»áÓгåÍ»µÄΣÏÕ¡£


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ÔÚǰ±ß¡°È·¶¨ÄãµÄIPµØÖ·¡±µÄÕ½ÚÖУ¬Äã¿ÉÄÜ×¢Òâµ½ÄǶùÓÐÁ½¸öÎÞÏßÍø¿¨£ºwlan0ºÍwlan0:0¡£¶Ë¿Úwlan0:0ÊÇ×÷Ϊ¶Ë¿Úwlan0µÄ×Ӷ˿ڴæÔÚµÄÒ»¸öÐéÄâ×Ӷ˿ڣ¬ÁíÍâÒ»¸öÃû³Æ½ÐIP alias¡£ip±ðÃûÊÇÒ»¸ö·Ç³£ÆÕ±éµÄ·½·¨À´´´ÔìÔÚÒ»¸öµ¥¶ÀµÄ¶Ë¿ÚÉÏÅäÖöà¸öIPµØÖ·¡£±ðÃûÃüÃû¹æÔòΪ ¸¸¶Ë¿Ú:X£¬XÊÇÄãÑ¡ÔñµÄ×Ó¶Ë¿ÚÊý¡£

´´ÔìÒ»¸öIP±ðÃû£¨×Ӷ˿ڣ©ÓëÅäÖÃÒ»¸öÕæÊµµÄ¶Ë¿ÚµÄ·½Ê½·Ç³£Ïà½ü£º
1. Ê×Ïȱ£Ö¤ÕæÊµµÄ¸¸¶Ë¿Ú´æÔÚ¡£

2. Äã×¼±¸ÅäÖõÄIP±ðÃûÓëÒÑÓеIJ»Öظ´¡£ÔÚÕâÀïÎÒÃÇÏ£ÍûÅäÖõÄÃû³ÆÎªwlan0:0¡£

3. ͨ¹ýifconfigÃüÁî´´ÔìÐéÄâ¶Ë¿Ú£º
   [root@bigboy tmp]# ifconfig wlan0:0 192.168.1.99 netmask 255.255.255.0 up

4. ÄãͬÑùÐèÒª´´ÔìÒ»¸ö/etc/sysconfig/network-scripts/ifcfg-wlan0:0ÎļþÀ´±£Ö¤±ðÃû¿ÉÒÔͨ¹ýifupºÍifdownÀ´×Ô¶¯ÅäÖá£ÒÔÏÂÊÇÅäÖÃÎļþÀ´×÷Ϊ·¶Àý£º
   DEVICE=wlan0:0
   ONBOOT=yes
   BOOTPROTO=static
   IPADDR=192.168.1.99
   NETMASK=255.255.255.0

½ûÓúͼ¤»îÐéÄâ¶Ë¿ÚµÄÃüÁîÈçÏ£º

     [root@bigboy tmp]# ifup wlan0:0
     [root@bigboy tmp]# ifdown wlan0:0

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¹Ø±ÕÖ÷¶Ë¿ÚµÄ»°£¬ËùÓдËÖ÷¶Ë¿ÚµÄ±ðÃû¶Ë¿Ú¶¼»á¸ú׏رա£µ«ÊDZðÃû¶Ë¿Ú¿ÉÒÔÏà¶ÔÓÚÆäËû¶Ë¿Ú¶øµ¥¶À¹Ø±Õ¡£

IPµØÖ·ÔÚDSLÁ¬½ÓÉϵķÖÅä

Èç¹ûÄãÅäÖù̶¨µÄIPµØÖ·À´Ê¹ÓÃDSLÁ¬½ÓµÄ»°£¬ÄÇôÅäÖ÷½Ê½ÓëÒÔÉÏÏàͬ¡£Äú¿ÉÒÔ°ÑÄúµÄÒÔÌ«ÍøÁ¬½ÓÏß½ÓÈëDSLèºó£¬ÅäÖúÃÓÉISPÌṩµÄIPµØÖ·£¬×ÓÍøÑÚÂ룬¹ã²¥µØÖ·ºÍÍø¹ØÐÅÏ¢µÈ£¬ÔÚÖØÆôÖ®ºó¼´¿É£¬ÁíÍâÀμǣ¬ÄãͬÑùÒªÅäÖúÃÄúµÄDNS·þÎñÆ÷¡£

Èç¹ûÄãʹÓÃDSLÁ¬½Óͨ¹ýDHCPÀ´»ñµÃ¶¯Ì¬IPµØÖ·£¬ÄÇô²½Öè¾ÍÓÐËù²»Í¬¡£ÄãµÄISP½«»áÌṩÄãPPPOEµÄÓû§ÃûºÍÃÜÂëÀ´ÔÊÐíÄãµÄµçÄÔÿ´ÎÆô¶¯ºóÁ¬½Óµ½internet¡£Fedora LinuxÐèÒª°²×°rp-pppoeRPM°üÀ´ÊµÏÖ¡£

 1. ±¸·Ýifcfg-eth0Îļþ£º

   [root@bigboy tmp]#
   [root@bigboy tmp]# cd /etc/sysconfig/network-scripts/
   [root@bigboy network-scripts]# ls ifcfg-eth0
   ifcfg-eth0
   [root@bigboy network-scripts]# cp ifcfg-eth0 DISABLED.ifcfg-eth0

2. ÅäÖÃÄãµÄifcfg-eth0Îļþ£¬Ê¹Æä²»°üº¬IPµØÖ·ÐÅϢͬʱÉèÖò»ËæÏµÍ³Æô¶¯¶ø¼¤»î

   DEVICE=eth0
   ONBOOT=no
3.¹Ø±Õeth0¶Ë¿Ú
   [root@bigboy network-scripts]# ifdown eth0
   [root@bigboy network-scripts]#
4.ʹÓÃadsl-configureÅäÖù¤¾ß
[root@bigboy network-scripts]# adsl-setup
½«»áÌáʾÄãÌṩISPµÄÓû§Ãû£¬Ê¹ÓõÄÍø¿¨Ãû³Æ(eth0)£¬ÒÔ¼°ÄãÊÇ·ñÐèÒªËæ»úÆ÷Æô¶¯Á¬½ÓµÈ
     Welcome to the ADSL client setup. First, I will run some checks on
     your system to make sure the PPPoE client is installed properly...

     LOGIN NAME

     Enter your Login Name (default root): bigboy-login@isp

     INTERFACE

     Enter the Ethernet interface connected to the ADSL modem
     For Solaris, this is likely to be something like /dev/hme0.
     For Linux, it will be ethX, where 'X' is a number.
     (default eth0):

     Do you want the link to come up on demand, or stay up continuously?
     If you want it to come up on demand, enter the idle time in seconds
     after which the link should be dropped. If you want the link to
     stay up permanently, enter 'no' (two letters, lower-case.)
     NOTE: Demand-activated links do not interact well with dynamic IP
     addresses. You may have some problems with demand-activated links.
     Enter the demand value (default no):
Ò»»á³ÌÐò»áÌáʾÄúÊäÈëDNS·þÎñÆ÷µÄÐÅÏ¢£¬ÕâÒ»²½ÊÇÓÃÀ´ÅäÖÃ/etc/resolve.confÎļþµÄ¡£Èç¹ûÄúÏëʹÓÃISPÌṩµÄDNSÐÅÏ¢£¬ÄÇôֻÐèÊäÈë"server"¼´¿É¡£
     DNS

     Please enter the IP address of your ISP's primary DNS server.
     If your ISP claims that 'the server will provide dynamic DNS
     addresses', enter 'server' (all lower-case) here.
     If you just press enter, I will assume you know what you are
     doing and not modify your DNS setup.
     Enter the DNS information here:
......

adsl-setup´´½¨µÄÎļþ

µÚÒ»¸öÎļþΪifcfg-ppp0£¬ÓÃÀ´ÃèÊöÁ´Â·²ãµÄÁ¬½Ó״̬¡£

    [root@bigboy network-scripts]# more ifcfg-ppp0
     USERCTL=yes
     BOOTPROTO=dialup
     NAME=DSLppp0
     DEVICE=ppp0
     TYPE=xDSL
     ONBOOT=yes
     PIDFILE=/var/run/pppoe-adsl.pid
     FIREWALL=NONE
     PING=.
     PPPOE_TIMEOUT=20
     LCP_FAILURE=3
     LCP_INTERVAL=80
     CLAMPMSS=1412
     CONNECT_POLL=6
     CONNECT_TIMEOUT=60
     DEFROUTE=yes
     SYNCHRONOUS=no
     ETH=eth0
     PROVIDER=DSLppp0
     USER= bigboy-login@isp
     PEERDNS=no
     [root@bigboy network-scripts]#

ÁíÍâÁ½¸öÏàͬµÄÎļþΪ/etc/ppp/pap-secretsºÍ/etc/ppp/chapsecrets,ÊÇÓÃÀ´±£´æÓû§ÃûºÍÃÜÂëµÄ

     [root@bigboy network-scripts]# more /etc/ppp/pap-secrets
     # Secrets for authentication using PAP
     # client        server  secret                  IP addresses
     "bigboy-login@isp" *       "password"
     [root@bigboy network-scripts]#

¼òµ¥µÄtroubleshooting

¿ÉÒÔʹÓÃadsl-statusÀ´¾ö¶¨ÄúÏÖÔÚµÄadsl¶Ë¿ÚµÄÁ¬½Ó״̬£º

     [root@bigboy tmp]# adsl-status
     Note: You have enabled demand-connection; adsl-status may be
     inaccurate.
     adsl-status: Link is attached to ppp0, but ppp0 is down
     [root@bigboy tmp]#
ÔÚÉϱߵÄÀý×ÓÖÐÈí¼þ°ü(package)ÒѾ­±»°²×°£¬µ«ÊǶ˿ڲ¢Ã»Óб»¼¤»î

ÔÚ¼¤»îºó£¬¶Ë¿Ú¹¤×÷Õý³£:

     [root@bigboy tmp]# ifup ppp0

     [root@bigboy tmp]# adsl-status
     adsl-status: Link is up and running on interface ppp0
     ppp0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1462 inet
     ...
     ...
     ...
     [root@bigboy tmp]#


			
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