3.9. Useful Commands in Coyote Linux[id=clcommands]

Useful commands in Coyote Linux.

• ping

  Useful to find out if the network is working. This command will see if there is any connection to Skolelinux/Debian-edu main server

  coyote# ping -c5 10.0.2.2
  PING 10.0.2.2 (10.0.2.2): 56 data bytes
  64 bytes from 10.0.2.2: icmp_seq=0 ttl=64 time=0.9 ms
  64 bytes from 10.0.2.2: icmp_seq=1 ttl=64 time=0.5 ms

• coyote#uptime

  This command gives you the time Coyote Linux has been running since last boot.

  coyote# uptime
    2:37pm  up 80 days,  7:55, load average: 0.00, 0.00, 0.00
  

• coyote#dmesg

  This command prints the information that the Linux kernel has found on your machine, things such as amount of RAM, CPU, network cards. If the output from dmesg is too much for the size of your screen, then you can pipe the output to the pager 'more', and use SPACE to read it all,

  dmesg|more

• coyote#ifconfig

  Shows verbose information about your network cards.

  coyote# ifconfig
  eth0      Link encap:Ethernet  HWaddr 00:50:DA:43:7A:E9
            inet addr:10.0.2.1  Bcast:10.0.3.255  Mask:255.255.254.0
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:27541711 errors:0 dropped:0 overruns:0 frame:0
            TX packets:34408201 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:100
            RX bytes:4029268333 (3842.6 MiB)  TX bytes:2039998168 (1945.4 MiB)
            Interrupt:14 Base address:0x8000
  
  eth1      Link encap:Ethernet  HWaddr 00:90:27:74:66:3B
            inet addr:193.116.174.121  Bcast:193.156.179.127  Mask:255.255.255.128
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:34739492 errors:0 dropped:0 overruns:0 frame:0
            TX packets:25470323 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:100
            RX bytes:2060262113 (1964.8 MiB)  TX bytes:3837976022 (3660.1 MiB)
            Interrupt:12 Base address:0x1000
  
  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:83 errors:0 dropped:0 overruns:0 frame:0
            TX packets:83 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:9112 (8.8 kiB)  TX bytes:9112 (8.8 kiB)
  
  

• coyote#lsmod

  This command lists loaded driver modules- useful to see which driver modules are used by the network cards.

  coyote# lsmod
  Module                  Size  Used by
  eepro100               17516   1
  3c59x                  24408   1
  mii                     1852   0 [eepro100]
  ip_nat_quake3           1608   0 (unused)
  ip_nat_mms              2448   0 (unused)
  ip_nat_h323             2044   0 (unused)
  ip_nat_amanda           1020   0 (unused)
  

  In this listing, you'll see that the network card driver modules Intel pro100 and 3com series 3c59x which include 3c590, 3c595, 3c900, 3c905 are loaded. See Section 3.12

• coyote#route

• coyote#traceroute

  Useful to trace the route a network packet takes; a nice way to find out where the problem really lies.

• coyote#showcfg

  Another command that gives information about the state of the network cards.

  Coyote running configuration display utility.
  
  Internet up (eth1): YES
  Local network up (eth0): YES
  
  ---------------Internet configuration------------
  IP Address  193.156.172.101 (DHCP Assigned)
  Netmask     255.255.255.128
  Gateway     193.116.172.1
  ---------------Local configuration---------------
  IP Address  10.0.2.1
  Netmask     255.255.254.0
  Broadcast   10.0.3.255
  ---------------Resolver configuration------------
  domain holmlia.gs.oslo.no
  nameserver 193.156.192.40
  nameserver 193.156.192.50
  -------------------------------------------------
  2:52pm up 80 days, 8:09, load average: 0.00, 0.00, 0.00
  
  

• coyote#free

  Use this command to see how much RAM you have in the machine, and how much is being used. This machine has 32MB of RAM.

  coyote# free
                total         used         free       shared      buffers
    Mem:        30860         6004        24856            0            0
   Swap:            0            0            0
  Total:        30860         6004        24856
  
  

• coyote#menu

  This commands starts the Coyote Linux Menu

                  Coyote Linux Gateway -- Configuration Menu
  
  
    1) Edit main configuration file         2) Change system password
    3) Edit rc.local script file            4) Custom firewall rules file
    5) Edit firewall configuration          6) Edit port forward configuration
  
    c) Show running configuration           f) Reload firewall
    r) Reboot system                        w) Write configuration to disk