Hi, all you unix people. I am a pretty advanced windows user, but I am curious about unix. Is there any reason I should attempt to acquire some form of unix for my home computer system? What sort of things is unix useful for? Unix is open source, right? Assuming that to be the case, I infer that... (3 Replies)
I run windows 2000 right now. I want to learn how to use unix/linux. How do i go about installing Unix/Linux? What's the easiest version to install? Where can i get it? Is my Hardware Compatable? How do i partition my Hd? HELP!!!!!:confused: (6 Replies)
ok i just installed FreeBSD 4.8 on a computer i had lying around and it was working ok but then when i tried to set up KDE's xdm (kdm) i think i must have configured the login manager wrong because i cant login through the kdm and therefore i can log in to BSD at all?!
please can someone help me... (5 Replies)
I don't even know if this should go here but I just would like to know what this means:
d0e45878043844ffc41aac437e86b602
I know absolutely nothin' about UNIX, and I found this in a SQL table in a board I run.
Someone please tell me what that is in "normal" mode.
Pardon me for my... (4 Replies)
I am wanting to download the Linux Program. When i go to download it I see several things to download. What do i download exactly? Then what do I do to install it. Also I have partitioned my hard drive to make way for Linux on the other part to play with it, will any problems arise from this?
I... (3 Replies)
This is probably a really simple problem, but goes easy on me I'm still a newb. The problem I have is that a script (we'll call it script.script) I edited won't run for some reason, I get the error "ksh: script.script: not found"
The location of my script is as follows: /home/users/arkitech
... (3 Replies)
Hey all. I'm brand spankin' new here to the board. I'm also a novice at Unix. I've been using it for about 1 year now but I haven't really expanded my abilities since I learned the basics. I am in school and I mainly just use Unix to submit stuff to assignment directories and use it to compile my... (3 Replies)
hi all, im working on a script that needs to read in a file, search for a string of text within that file, and if the string is found, do something. so i know i need to use an if-then statement, but how do i test for the existence of a string within the file? any help would be greatly appreciated. (6 Replies)
So here is my problem:
I need to do a sed search and replace on the following:
variable_blah_STATUS replaced with "replace string".
sed 's/variable_blah_STATUS/replace string/g' works great but there is a catch.
The catch is that I need to check and not replace variable_blah_STATUS... (3 Replies)
Hello, I am totally new to Unix
We have a piece of test equipment, three of them actually, that run HP-UX 9.0 from like 1994. We had backup tapes with procedures to load the OS and our test software, but the 16-track tapes are corrupt now. HP will not support it, they dont have it anymore,... (11 Replies)
Discussion started by: Newball80
11 Replies
LEARN ABOUT FREEBSD
ddb
DDB(8) BSD System Manager's Manual DDB(8)NAME
ddb -- configure DDB kernel debugger properties
SYNOPSIS
ddb capture [-M -core] [-N -system] print
ddb capture [-M -core] [-N -system] status
ddb script scriptname
ddb script scriptname=script
ddb scripts
ddb unscript scriptname
ddb pathname
DESCRIPTION
The ddb utility configures certain aspects of the ddb(4) kernel debugger from user space that are not configured at compile-time or easily
via sysctl(8) MIB entries.
To ease configuration, commands can be put in a file which is processed using ddb as shown in the last synopsis line. An absolute pathname
must be used. The file will be read line by line and applied as arguments to the ddb utility. Whitespace at the beginning of lines will be
ignored as will lines where the first non-whitespace character is '#'.
OUTPUT CAPTURE
The ddb utility can be used to extract the contents of the ddb(4) output capture buffer of the current live kernel, or from the crash dump of
a kernel on disk. The following debugger commands are available from the command line:
capture [-M core] [-N system] print
Print the current contents of the ddb(4) output capture buffer.
capture [-M core] [-N system] status
Print the current status of the ddb(4) output capture buffer.
SCRIPTING
The ddb utility can be used to configure aspects of ddb(4) scripting from user space; scripting support is described in more detail in
ddb(4). Each of the debugger commands is available from the command line:
script scriptname
Print the script named scriptname.
script scriptname=script
Define a script named scriptname. As many scripts contain characters interpreted in special ways by the shell, it is advisable to
enclose script in quotes.
scripts
List currently defined scripts.
unscript scriptname
Delete the script named scriptname.
EXIT STATUS
The ddb utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal:
ddb script kdb.enter.break="show pcpu; bt"
The following example will delete the script:
ddb unscript kdb.enter.break
For further examples, see the ddb(4) and textdump(4) manual pages.
SEE ALSO ddb(4), textdump(4), sysctl(8)HISTORY
The ddb utility first appeared in FreeBSD 7.1.
AUTHORS
Robert N M Watson
BUGS
Ideally, ddb would not exist, as all pertinent aspects of ddb(4) could be configured directly via sysctl(8).
BSD December 24, 2008 BSD
09-22-2011
