Friday, July 29, 2011

Set GateWay under Windows MS-DOS command line

C:\Documents and Settings\q.yang>route

Manipulates network routing tables.

ROUTE [-f] [-p] [command [destination]
[MASK netmask] [gateway] [METRIC metric] [IF interface]

-f Clears the routing tables of all gateway entries. If this is
used in conjunction with one of the commands, the tables are
cleared prior to running the command.
-p When used with the ADD command, makes a route persistent across
boots of the system. By default, routes are not preserved
when the system is restarted. Ignored for all other commands,
which always affect the appropriate persistent routes. This
option is not supported in Windows 95.
command One of these:
PRINT Prints a route
ADD Adds a route
DELETE Deletes a route
CHANGE Modifies an existing route
destination Specifies the host.
MASK Specifies that the next parameter is the 'netmask' value.
netmask Specifies a subnet mask value for this route entry.
If not specified, it defaults to 255.255.255.255.
gateway Specifies gateway.
interface the interface number for the specified route.
METRIC specifies the metric, ie. cost for the destination.

All symbolic names used for destination are looked up in the network database
file NETWORKS. The symbolic names for gateway are looked up in the host name
database file HOSTS.

If the command is PRINT or DELETE. Destination or gateway can be a wildcard,
(wildcard is specified as a star '*'), or the gateway argument may be omitted.

If Dest contains a * or ?, it is treated as a shell pattern, and only
matching destination routes are printed. The '*' matches any string,
and '?' matches any one char. Examples: 157.*.1, 157.*, 127.*, *224*.
Diagnostic Notes:
Invalid MASK generates an error, that is when (DEST & MASK) != DEST.
Example> route ADD 157.0.0.0 MASK 155.0.0.0 157.55.80.1 IF 1
The route addition failed: The specified mask parameter is invalid.
(Destination & Mask) != Destination.

Examples:

> route PRINT
> route ADD 157.0.0.0 MASK 255.0.0.0 157.55.80.1 METRIC 3 IF 2
destination^ ^mask ^gateway metric^ ^
Interface^
If IF is not given, it tries to find the best interface for a given
gateway.
> route PRINT
> route PRINT 157* .... Only prints those matching 157*
> route CHANGE 157.0.0.0 MASK 255.0.0.0 157.55.80.5 METRIC 2 IF 2

CHANGE is used to modify gateway and/or metric only.
> route PRINT
> route DELETE 157.0.0.0
> route PRINT

C:\Documents and Settings\q.yang>route ADD 192.168.0.0 MASK 255.255.255.0 10.10.
20.201 -p

C:\Documents and Settings\q.yang>ping 192.168.0.1

Pinging 192.168.0.1 with 32 bytes of data:

Reply from 192.168.0.1: bytes=32 time=10ms TTL=255
Reply from 192.168.0.1: bytes=32 time=1ms TTL=255
Reply from 192.168.0.1: bytes=32 time=1ms TTL=255
Reply from 192.168.0.1: bytes=32 time=1ms TTL=255

Ping statistics for 192.168.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 10ms, Average = 3ms

C:\Documents and Settings\q.yang>ping 192.168.0.2

Pinging 192.168.0.2 with 32 bytes of data:

Reply from 192.168.0.2: bytes=32 time=48ms TTL=254
Reply from 192.168.0.2: bytes=32 time=50ms TTL=254
Reply from 192.168.0.2: bytes=32 time=50ms TTL=254
Reply from 192.168.0.2: bytes=32 time=50ms TTL=254

Ping statistics for 192.168.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 48ms, Maximum = 50ms, Average = 49ms

C:\Documents and Settings\q.yang>route ADD 192.168.1.0 MASK 255.255.255.0 10.10.
20.201 -p

C:\Documents and Settings\q.yang>ping 192.168.0.3

Pinging 192.168.0.3 with 32 bytes of data:

Reply from 192.168.0.3: bytes=32 time=50ms TTL=254
Reply from 192.168.0.3: bytes=32 time=49ms TTL=254
Reply from 192.168.0.3: bytes=32 time=49ms TTL=254
Reply from 192.168.0.3: bytes=32 time=59ms TTL=254

Ping statistics for 192.168.0.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 49ms, Maximum = 59ms, Average = 51ms

C:\Documents and Settings\q.yang>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time=48ms TTL=254
Reply from 192.168.1.1: bytes=32 time=50ms TTL=254
Reply from 192.168.1.1: bytes=32 time=50ms TTL=254
Reply from 192.168.1.1: bytes=32 time=50ms TTL=254

Ping statistics for 192.168.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 48ms, Maximum = 50ms, Average = 49ms

C:\Documents and Settings\q.yang>ping 192.168.1.2

Pinging 192.168.1.2 with 32 bytes of data:

Reply from 192.168.1.2: bytes=32 time=64ms TTL=98
Reply from 192.168.1.2: bytes=32 time=58ms TTL=98
Reply from 192.168.1.2: bytes=32 time=58ms TTL=98
Reply from 192.168.1.2: bytes=32 time=57ms TTL=98

Ping statistics for 192.168.1.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 57ms, Maximum = 64ms, Average = 59ms

Tuesday, July 19, 2011

SAMBA Setting -- Ubuntu 10.10

[1] https://help.ubuntu.com/community/Samba/SambaServerGuide
[2] https://help.ubuntu.com/community/Samba


INSTALL SAMBA IF NOT INSTALLED (Live Ubuntu CD doesn't install in default)
---------------------------------------------------------------------------
In order to apply patch file, set up Samba server for file exchange between Windows
and Ubuntu box.

quentin@ubuntu:~/lpc3250/ltib-qs$ sudo apt-get install samba-common-bin (has to be done to get samba work)
quentin@ubuntu:~/lpc3250/ltib-qs$ sudo apt-get install system-config-samba



ADD SAMBA PASSWORD PROTECTION FOR ONE USER IN CMD LINE
----------------------------------------------------------
sudo smbpasswd -a username

RESTART SAMBA SERVER IN UBUNTU
------------------------------
sudo restart smbd


MANUALLY ADD SHARE BY EDITING SMB.CONF
(if no luck to set it by using system-config-samba GUI)
--------------------------------------------------------------
(system-config-samba might issue warning on smb.conf syntax error but it won't affect the sharing of folders) See [2], another way to run Samba as service


quentin@QuentinUbuntu:/media/WQYSada$ ll /etc/samba/
total 32
drwxr-xr-x 2 root root 4096 2011-07-21 20:53 ./
drwxr-xr-x 137 root root 12288 2011-10-15 12:47 ../
-rw-r--r-- 1 root root 8 2010-10-06 09:26 gdbcommands
-rw-r--r-- 1 root root 11553 2011-07-21 20:53 smb.conf
-rw-r--r-- 1 root root 0 2011-07-21 20:43 smbusers


quentin@ubuntu:~$ diff smb.conf smb-vm.conf
110c110
< passdb backend = tdbsam
---
> ; passdb backend = tdbsam
191c191

> username map = /etc/samba/smbusers
298c299

[printers]

< guest ok = no
---
> ; guest ok = no

---ADD THIS SECTION AT THE END OF SMB.CONF---

[UbuntuQt]
comment = Quentin's DwLd folder on Ubuntu
path = /home/quentin
writeable = yes
; browseable = yes
valid users = quentin

Sunday, July 17, 2011

Why is JSON so popular? Developers want out of the syntax business.

[1] http://blog.mongolab.com/2011/03/why-is-json-so-popular-developers-want-out-of-the-syntax-business/

Wednesday, July 6, 2011

CmdLine ----- Check Public IP address

[1] http://www.simplehelp.net/2009/04/07/how-to-find-your-public-ip-address-with-the-linux-command-line/

[root@GsnCommsModule /]# wget -q -O - http://checkip.dyndns.org
...Current IP Check Current IP Address: 1.152.83.93...

wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//'

Tuesday, July 5, 2011

ntpclient NTP used in Embedded Linux

[1] http://doolittle.icarus.com/ntpclient/README



ntpclient home page: http://doolittle.icarus.com/ntpclient/

Joachim Nilsson created a fork of ntpclient that he maintains at
http://vmlinux.org/jocke/ntpclient.shtml. We don't have the same
maintainance and build system sensibilities; some people may prefer his.
In particular, he has converted his ntpclient to daemon and syslog.
The basic functionality of the two versions should be identical.

Usage: ntpclient [options]
options:
-c count stop after count time measurements (default 0 means go forever)
-d print diagnostics (feature can be disabled at compile time)
-g goodness causes ntpclient to stop after getting a result more accurate
than goodness (microseconds, default 0 means go forever)
-h hostname (mandatory) NTP server, against which to measure system time
-i interval check time every interval seconds (default 600)
-l attempt to lock local clock to server using adjtimex(2)
-p port local NTP client UDP port (default 0 means "any available")
-q min_delay minimum packet delay for transaction (default 800 microseconds)
-r replay analysis code based on stdin
-s simple clock set (implies -c 1)
-t trust network and server, no RFC-4330 recommended cross-checks