Notes by woolf
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Created by woolf on February 17, 2012 13:08:52
Last update: February 17, 2012 13:08:52
The steps:
Click File , then Info
Click M anage Rules & Alerts
Click New Rule in Rules and Alerts
To block a sender, select "Move messages from someone to a folder"
Created by woolf on February 17, 2012 13:01:41
Last update: February 17, 2012 13:01:41
The steps:
Click File then Info
Click Automatic Replies .
Created by woolf on December 29, 2011 11:47:37
Last update: December 29, 2011 11:48:11
My Dell laptop wasn't able to use an external monitor after a week's vacation. The symptoms were:
No response when pressing Fn+F8 to swtich displays.
"No signal" on external monitor.
Bring up "Screen Resolution" dialog, only one monitor is avaiable.
Click "Advanced settings" in "Screen Resolution" dialog, Adapter Type displays "VgaSave".
There's no "Display adapters" section in Device Manager .
Solution: re-install the video display driver. My laptop came with Nvidia GPU so I reinstalled the Nvidia driver. Download the driver pack from Dell. The Windows 7 CAB file is about 1GB, which indludes all kinds of drivers.
Created by woolf on December 29, 2011 11:18:11
Last update: December 29, 2011 11:18:11
Use the expand command to extract files from a .cab file:
expand [-r] source [destination] [-d source.cab ... Option Description [-r] Renames expanded files. [destination] Specifies where files are to be expanded. If source is multiple files and -r is not specified, destination must be a directory. destination can consist of a drive letter and colon, a directory name, a file name, or a combination of any of these. [-d source.cab] Displays a list of files in the source location. Does not expand or extract the files. [-f:files] Specifies the files in a cabinet (.cab) file that you intend to expand. You can use wildcards (* and ?). source.cab Specifies the files to expand. source can consist of a drive letter and colon, a directory...
Created by woolf on July 30, 2011 13:03:48
Last update: October 24, 2011 07:52:42
Contrary to the DD-WRT router database , the Belkin F5D7231-4 v2000 cannot be flashed with TFTP . When I followed the TFTP procedures, I always got TTL=64 , never TTL=100 or TTL=128 , which is supposed to indicate that the router TFTPd is ready. I got network timeout when I tried to send the bin file anyway. The right way to flash the Belkin F5D7231-4 v2000 is to use the binary and Sercomm Utility provided by eko. Simply: Put the router in upgrade mode: unplug router, press reset button and keep it pressed while plugging in the power. Release it when lan leds turn off. Power and Connected led must blink . start the Sercomm Utility select the network interface connected to the router select...
Created by woolf on September 23, 2011 15:02:15
Last update: September 23, 2011 15:02:15
There's no file for OpenWRT syslog. Instead, syslog is a fixed size buffer in memory. Use logread to look at syslog:
root@OpenWrt:/# logread -h
logread: invalid opt...
To tail the log:
root@OpenWrt:/# logread -f
Created by woolf on August 07, 2011 15:17:12
Last update: August 07, 2011 15:17:12
Normally opkg installs packages from a repository which is specified in /etc/opkg.conf :
src/gz packages http://downloads.openwrt.org/backf...
What if you built a package locally and want to install that instead? Do this instead of setting up your own web server:
Copy your package ( .ipk file) to /tmp on the router:
$ scp mypackage_brcm63xx.ipk root@172.30.33.1:/tmp...
Copy the Packages file to the router:
$ scp Packages root@172.30.33.1:/var/opkg-lists/pa...
Log on the router, cd /tmp and install the local package:
root@OpenWrt:~# opkg install mypackage_brcm63xx.ip...
Created by woolf on July 30, 2011 13:18:57
Last update: July 30, 2011 13:19:21
The normal 30/30/30 reset does not work for the TP-Link TL-WR1043ND running OpenWRT. OpenWRT provides a failesafe mode from where you can recover any configuration mistakes. For the TP-Link TL-WR1043ND:
Power up the router
When SYS button starts to blink, press and hold the QSS button till SYS starts to blink faster
Telnet to 192.168.1.1. No password needed.
Erase user space data with
mtd -r erase rootfs_data
or mount the jffs2 file system with:
mount_root
and start fixing things.
Created by woolf on July 04, 2011 18:58:08
Last update: July 04, 2011 19:32:31
Wifi router firmware has three parts:
CFE (Common Firmware Environment):
The CFE (aka boot loader) performs low-level initializations and is used to bootstrap the OS.
NVRAM (Non-volatile RAM):
NVRAM can hold its contents even when the main power source is lost. Configuration settings are stored in NVRAM. When you do a 30-30-30 hard reset, you are resetting the NVRAM to factory defaults.
Kernel :
The kernel is the OS of the router. It is stored in the onboard Flash chip.
From DD-WRT forum (the peacock thread):
You can erase the nvram. You can reflash the kernel. But if you don't have a CFE file FOR your specific model of router, you are pooched.
Links:
TFTP flash
CFE Backup
JTAG-adapter
JTAG
Serial Recovery
Created by woolf on June 25, 2011 10:55:08
Last update: June 25, 2011 10:57:15
My C drive was seriously fragmented with about 20% free space. So I ran the built-in Windows disk defrag utility. To my surprise it doesn't work at all! I tried to defragment multiple times and every time it comes back without doing much work. Then I realized that perhaps it didn't know how to get the job done and needed some help. Here's the list of things I did to help the defragmentor out: Relocate the paging file to a different drive and reboot. If the paging file ( pagefile.sys ) is seriously fragmented, it can't be defragmented, and in turn it blocks other files from being defragmented. If you only have one drive (C:), try to make it smaller or eliminate it entirely for...
