Hello everyone. Well, I will get right to the point. I am new to Perl and trying to learn it as much as I can. I have been assigned the task of writing a perl script to extract information from firewall logs.
Like I said, I am new to Perl and I am having a tough time because I think what I am... (3 Replies)
Anyone have an example of a simple shell script that solicits a (Y)es or (N)o response from the user. If the response is 'Y' display a message on the screen that thanks the user for the positive response. If the response is 'N' display a message that thanks the user for the negative response. If... (15 Replies)
Hi, I need help writing a unix script to change the time in the server automatically when it reaches a specified time.
Only on the 14th of april, when the time becomes midnight (00:00:00), I need the server to change the time automatically to 23:30:00 and start working on as usual with a... (2 Replies)
hi all
i am having a file(a fixed length file) of 28 bytes.The file has account number from 5th place to next 16 digits.
the file looks like below,
58331600563588885696ACXT5263
58331600563588885697ACXT5263
58331600563588885698ACXT5263
i want to write a script which will extract the... (8 Replies)
Here is the script I am trying to write along with my answer I wrote. Please help me understand why it doesn't work.
Create an executable script file called "newname" that will perform the followings:
1. Rename a file upon the user's request. If the file exists, prompt the user for... (1 Reply)
Hi,
I have written a script which converts a give hexdecimal value to binary value in perl. But now, the problem is I should read every bit of it ( if its 10101010, i should read the value in each position and if the value in that position is 1 i should print a string and should exit if its... (1 Reply)
hello all,
I have a script, used to search for the strings from the set of 5 similar pattern file from the log dir. So here it goes . The input parameter is a part of the file name. When during the script execution, the script should parse the input parameter to original file's with the same... (0 Replies)
Dear Madam/Sir
Who can help me with writing a script doing the following?
1- Read names of files (only files with special name format let say initially they have the same file name start like TT*)
2- Then create an empty files with the same names have been read in step one but with extension... (1 Reply)
i need some help in donig some actions on files in a library.
i want to get the n last files, and print to the screen their name, date, and how many times a specific string appears in each file..
how can i do this..?... (6 Replies)
I am new for script writing. I have a file named as name.dat and contain numbers with different rows and columns. I want to sum numbers at one row with that of at another row; like row1 + row101 + row 201, with corresponding columns. Any one can help me to write a script for this operation.
... (1 Reply)
Discussion started by: kumnegert
1 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