02-21-2013
Thanks! That did the trick.
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1. Shell Programming and Scripting
I built a 12 million record file and made a mistake, one field is 1 character too long.
The record is 40 bytes and ends always in 999. I am trying to delete the 37 character in each record. Is this possible without doing a cut and paste. (1 Reply)
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2. Shell Programming and Scripting
Hello,
I think I'm close to doing this, but I could be wrong.
I have a string I would like to search for and delete the last character of the that line.
This is what I have...
sed 's/POHEAD\(.\)$//g' tempd > tempe
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3. Shell Programming and Scripting
hi all,
i want to delete a space character in word on unix script with command sed like :
#dia n
result:
#dian
is there anyone will help me ?
regards,
cahyo (1 Reply)
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4. UNIX for Dummies Questions & Answers
Hi,
I have a .txt and I need to delete the characters betwwen the 10th and 20th...
How can I do that...
I need to do somethink like these:
%s/I don't know how to define a range between 10th and 20th character//g
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Hi,
Please help me to edit a file, with the following changes,
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Hi all
I am trying to get my head around doing the following....
I have an input field that could contain either a number a blank field or a whitespace field.
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Sample file:
This is line one,
this is another line,
this is the PRIMARY INDEX line
l ;
This is another line
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Hi,
1/
i have file test.txt
1 Jul 28 08:35:29 2014-07-28 Root::UserA
1 Jul 28 08:36:44 2014-07-28 Root::UserB i want to delete the seconds of the file, and the Root:: and the output will be:
1 Jul 28 08:35 2014-07-28 UserA
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Hi,
Anyone can help using SED searches a character string for a specified delimiter character, and returns a leading or trailing space/blank.
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"1"|"ExternalClassDEA519CF5"|"Art1"
"2"|"ExternalClass563EA516C"|"Art3"
"3"|"ExternalClass305ED16B8"|"Art9"
...
...
... (2 Replies)
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10. Shell Programming and Scripting
I will appreciate if you help me here in this script in Solaris Enviroment.
Scenario:
i have 2 files :
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201807300000000004
201807300000000005
201807300000000006
201807300000000007
201807300000000008
2)... (10 Replies)
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LEARN ABOUT CENTOS
trace_printk
TRACE_PRINTK(9) Driver Basics TRACE_PRINTK(9)
NAME
trace_printk - printf formatting in the ftrace buffer
SYNOPSIS
trace_printk(fmt, ...);
ARGUMENTS
fmt
the printf format for printing
...
variable arguments
NOTE
__trace_printk is an internal function for trace_printk and the ip is passed in via the trace_printk macro.
This function allows a kernel developer to debug fast path sections that printk is not appropriate for. By scattering in various printk
like tracing in the code, a developer can quickly see where problems are occurring.
This is intended as a debugging tool for the developer only. Please refrain from leaving trace_printks scattered around in your code.
(Extra memory is used for special buffers that are allocated when trace_printk is used)
A little optization trick is done here. If there's only one argument, there's no need to scan the string for printf formats. The trace_puts
will suffice. But how can we take advantage of using trace_puts when trace_printk has only one argument? By stringifying the args and
checking the size we can tell whether or not there are args. __stringify((__VA_ARGS__)) will turn into "() " with a size of 3 when there
are no args, anything else will be bigger. All we need to do is define a string to this, and then take its size and compare to 3. If it's
bigger, use do_trace_printk otherwise, optimize it to trace_puts. Then just let gcc optimize the rest.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 TRACE_PRINTK(9)