I was getting CUPSD errors when trying to use my Laser Brother HL 2040 printer. But, you can install Brother HL-2040 by going to the brother website and downloading the linux drivers located here:
http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#HL-2040
I just installed the lpd driver using the command as follows:
$ sudo dpkg -i brhl2070nlpr-2.0.1-1.i386.deb
When printing now, just select local lpd and then select brother-HL2070 printer from the list (the drivers for both versions are same).

Over this weekend I decided to download the Android source tree on my computer (Backtrack 4 R2). The BT4R2 is no longer supported by the Offsec/Backtrack guys (mutt, purehate, etc.).
To start off with I tried to follow the instructions listed here.
The first error I got was with Git, I was using a version earlier than 1.5.4. So I downloaded git version 1.7.4, compiled it and installed it. Then I got the error:
fatal: unable to find remote handler for 'https'
Too bad, I tried recompiling and what not, and I did have openssl…so what was the problem?
The problem was not having libcurl-devel library. So I downloaded the library and launched configure, make clean, make and make install to reinstall git. Now the error was gone.

On the step where I am supposed to execute the following:
$ repo init -u https://android.googlesource.com/platform/manifest
I got the following error:

Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
self.run()
File "/usr/lib/python2.5/threading.py", line 446, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/bin/.repo/repo/subcmds/sync.py", line 182, in _FetchHelper
success = project.Sync_NetworkHalf(quiet=opt.quiet)
File "/home/user/bin/.repo/repo/project.py", line 926, in Sync_NetworkHalf
if alt_dir is None and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
File "/home/user/bin/.repo/repo/project.py", line 1444, in _ApplyCloneBundle
exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/user/bin/.repo/repo/project.py", line 1514, in _FetchBundle
size = r.headers['content-length']
File "/usr/lib/python2.5/rfc822.py", line 384, in __getitem__
return self.dict[name.lower()]
KeyError: 'content-length'
Exception in thread Thread-3:
Traceback (most recent call last):
File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
self.run()
File "/usr/lib/python2.5/threading.py", line 446, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/bin/.repo/repo/subcmds/sync.py", line 182, in _FetchHelper
success = project.Sync_NetworkHalf(quiet=opt.quiet)
File "/home/user/bin/.repo/repo/project.py", line 926, in Sync_NetworkHalf
if alt_dir is None and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
File "/home/user/bin/.repo/repo/project.py", line 1444, in _ApplyCloneBundle
exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/user/bin/.repo/repo/project.py", line 1514, in _FetchBundle
size = r.headers['content-length']
File "/usr/lib/python2.5/rfc822.py", line 384, in __getitem__
return self.dict[name.lower()]
KeyError: 'content-length'
Exception in thread Thread-4:
Traceback (most recent call last):
File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
self.run()
File "/usr/lib/python2.5/threading.py", line 446, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/bin/.repo/repo/subcmds/sync.py", line 182, in _FetchHelper
success = project.Sync_NetworkHalf(quiet=opt.quiet)
File "/home/user/bin/.repo/repo/project.py", line 926, in Sync_NetworkHalf
if alt_dir is None and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
File "/home/user/bin/.repo/repo/project.py", line 1444, in _ApplyCloneBundle
exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/user/bin/.repo/repo/project.py", line 1514, in _FetchBundle
size = r.headers['content-length']
File "/usr/lib/python2.5/rfc822.py", line 384, in __getitem__
return self.dict[name.lower()]
KeyError: 'content-length'
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
self.run()
File "/usr/lib/python2.5/threading.py", line 446, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/bin/.repo/repo/subcmds/sync.py", line 182, in _FetchHelper
success = project.Sync_NetworkHalf(quiet=opt.quiet)
File "/home/user/bin/.repo/repo/project.py", line 926, in Sync_NetworkHalf
if alt_dir is None and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
File "/home/user/bin/.repo/repo/project.py", line 1444, in _ApplyCloneBundle
exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/user/bin/.repo/repo/project.py", line 1514, in _FetchBundle
size = r.headers['content-length']
File "/usr/lib/python2.5/rfc822.py", line 384, in __getitem__
return self.dict[name.lower()]
KeyError: 'content-length'
Exception in thread Thread-5:
Traceback (most recent call last):
File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
self.run()
File "/usr/lib/python2.5/threading.py", line 446, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/bin/.repo/repo/subcmds/sync.py", line 182, in _FetchHelper
success = project.Sync_NetworkHalf(quiet=opt.quiet)
File "/home/user/bin/.repo/repo/project.py", line 926, in Sync_NetworkHalf
if alt_dir is None and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
File "/home/user/bin/.repo/repo/project.py", line 1444, in _ApplyCloneBundle
exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/user/bin/.repo/repo/project.py", line 1514, in _FetchBundle
size = r.headers['content-length']
File "/usr/lib/python2.5/rfc822.py", line 384, in __getitem__
return self.dict[name.lower()]
KeyError: 'content-length'
error: Exited sync due to fetch errors


Seems like this error is caused because the content-length http header is not sent by the repository. If you upgrade to Python 2.7.x you can resolve this error.
Now if you are compiling Python from source, it doesn’t come by default with SSL support. So to add SSL support you should edit the Python-2.7/Modules/Setup file and uncomment four lines:
_socket socketmodule.c
# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
SSL=/usr
_ssl _ssl.c \
-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
-L$(SSL)/lib -lssl -lcrypto
Of course, then you can do the standard steps to compile and install python:
$ ./configure
$ make
$ sudo make install

repo sync would work very well thereafter.

I kept getting the following errors on my AD domain in the event viewer and accounts kept locking out:
Pre-authentication failed:
User Name:      user1
User ID:                DOMAIN\user1
Service Name:   krbtgt/DOMAIN.COM
Pre-Authentication Type:        0x0
Failure Code:   0x12
Client Address: 192.168.246.134

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

In the Directory Service logs I see the following entry:
[snip]
Active Directory could not update the following object with changes
received from the domain controller at the following network address
because Active Directory was busy processing information.

Turns out this happens if you have samba/winbind/AD type infrastructure. If someone has some processes running (Even if they us sudo) and happen to change their password while the process is running on unix (and using kerberos authentication), the accounts lockout because the kerberos ticket granting ticket (krbtgt) is not current and any object access is considered to be a failed login attempt. This locks out the accounts if you have account lockout implemented in your AD domain security policy.

I encountered various errors when compiling wepattack. This download does not come with a makefile that is compatible with the ubuntu distro that backtrack uses. First of all make sure that the wlan directory that you get when untarring the .tar.gz archive has execute permissions set to it.

$ cd WepAttack-0.1.3/src
$ chmod +x wlan

Once this is done “permission denied” errors should go.

/Desktop/WepAttack-0.1.3/src$ make
gcc -fno-for-scope -c -D__LINUX_WLAN__ -D__I386__ -o wepattack.o wepattack.c
cc1: warning: command line option "-fno-for-scope" is valid for C++/ObjC++ but not for C
wepattack.c: In function ‘loop_packets’:
wepattack.c:141: warning: incompatible implicit declaration of built-in function ‘strlen’
wepattack.c:146: warning: incompatible implicit declaration of built-in function ‘strlen’
wepattack.c:151: warning: incompatible implicit declaration of built-in function ‘strlen’
wepattack.c:156: warning: incompatible implicit declaration of built-in function ‘strlen’
wepattack.c: In function ‘clean_up’:
wepattack.c:184: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’
wepattack.c: In function ‘main’:
wepattack.c:309: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’
gcc -fno-for-scope -c -D__LINUX_WLAN__ -D__I386__ -o rc4.o rc4.c
cc1: warning: command line option "-fno-for-scope" is valid for C++/ObjC++ but not for C
gcc -fno-for-scope -c -D__LINUX_WLAN__ -D__I386__ -o wepfilter.o wepfilter.c
cc1: warning: command line option "-fno-for-scope" is valid for C++/ObjC++ but not for C
gcc -fno-for-scope -c -D__LINUX_WLAN__ -D__I386__ -o log.o log.c
cc1: warning: command line option "-fno-for-scope" is valid for C++/ObjC++ but not for C
gcc -fno-for-scope -c -D__LINUX_WLAN__ -D__I386__ -o modes.o modes.c
cc1: warning: command line option "-fno-for-scope" is valid for C++/ObjC++ but not for C
modes.c:25:30: error: wlan/wlan_compat.h: Permission denied
modes.c:26:28: error: wlan/p80211hdr.h: Permission denied
modes.c: In function ‘generate_rc4_key’:
modes.c:51: warning: incompatible implicit declaration of built-in function ‘memcpy’
modes.c: In function ‘process_rc4_key’:
modes.c:68: warning: incompatible implicit declaration of built-in function ‘memcpy’
modes.c: In function ‘mode_keygen’:
modes.c:125: warning: incompatible implicit declaration of built-in function ‘memcpy’
modes.c:127: warning: incompatible implicit declaration of built-in function ‘strcpy’
modes.c: In function ‘mode_wep’:
modes.c:145: warning: incompatible implicit declaration of built-in function ‘memcpy’
make: *** [modes.o] Error 1

The following patch file will take care of most errors and you should be able to get Wepattack compiled properly:

diff -aur WepAttack-0.1.3/src/Makefile WepAttack-patched/src/Makefile
--- WepAttack-0.1.3/src/Makefile 2002-10-23 09:11:36.000000000 -0400
+++ WepAttack-patched/src/Makefile 2010-09-26 04:54:20.000000000 -0400
@@ -6,23 +6,23 @@
LD=gcc
#
# CFLAGS
-CFLAGS=-fno-for-scope -c -D__LINUX_WLAN__ -D__I386__
+CFLAGS= -c -D__LINUX_WLAN__ -D__I386__
#
#
# LDFLAGS
-#LDFLAGS=
+LDFLAGS=-L../run
#
#
# Libraries to link against
-LIBS= -lpcap -lz -lcrypto
+LIBS= -lpcap -lz -lcrypto
#
#
# Install path for wepattack
INSTDIR=/usr/bin

// main loop to process key in modes on every packet

Copy the above patch in to a file called wepattack.patch. Copy wepattack.patch into the WepAttack-0.1.3 directory and patch it as follows:

$ patch -p1 <wepattack.patch
$ cd src
make
sudo make install

You should be able to get wepattack installed!

Cisco ASDM is quirky in the sense that if the right Java version is not found it will just puke with errors that make no sense. This is what my java log looks like:
Application Logging Started at Fri Aug 01 11:01:11 EDT 2010
---------------------------------------------
Local Launcher Version = 1.5.41
Local Launcher Version Display = 1.5(41)
Cannot read profile file C:\Documents and Settings\abcdef\.asdm\data\deviceinfo.conf.
OK button clicked
Trying for ASDM Version file; url = https://www.example.com/admin/
Server Version = 6.2(1)
Server Launcher Version = 1.5.41, size = 476672 bytes
Launcher version checking is successful.
invoking SGZ Loader..
Cache location = C:/Documents and Settings/abcdef/.asdm/cache
Exception in thread "SGZ Loader: launchSgzApplet" java.lang.NoSuchFieldError: b
at dac.setLevel(dac.java:65)
at dac.(dac.java:44)
at gd.(gd.java:78)
at f5.a(f5.java:117)
at com.cisco.dmcommon.util.DMCommonEnv.(DMCommonEnv.java:38)
at com.cisco.pdm.PDMApplet.updateProgress(PDMApplet.java:300)
at com.cisco.pdm.PDMApplet.init(PDMApplet.java:63)
at com.cisco.nm.dice.loader.r.run(DashoA19*..:409)
It happens because the ASDM launcher is not capable of running on newer JVMs. Since I had older JVMs, I went into Control Panel -> Java. Click on the Java tab, followed by clicking the “view” button. This will show you the current JVM being used. If you have older JVMs click on Find (you will have to select the folder where you suspect older JVMs to be…which in my case was c:\Program Files). If you don’t find an older JVM then just install an older version and it will work.