07-23-2013
Thanks very much Yoda ! Did the trick
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1. Shell Programming and Scripting
Hi
I am basically checking if a required entry exists within a file. In the code below I am fetching all directories of the format rel1, rela, rel3..etc..The same entries also exist in the sample log file. I want to check if entry in file1 exists within file2 but it is failing. Can you please... (4 Replies)
Discussion started by: swasid
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2. UNIX for Dummies Questions & Answers
I'm still beginner and maybe someone can help me.
I have this input:
the great warrior a, b, c
and what i want to know is, with awk, how can i detect the string with 'warrior' string on it and print the a, b, and c seperately, become like this :
Warrior Type
a
b
c
Im still very... (3 Replies)
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3. Shell Programming and Scripting
I need to get notification via email when the line containing a pattern is changed in a file. Not during the time any changes to file occurs. Ie if we reset a user password say example, demouser the hash in the line containing the word demouser in the file /etc/group changes. So when this change... (1 Reply)
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4. Shell Programming and Scripting
Hello All,
can someone please suggest me a one line command to change a specific value that is associated to an entry in the file.
for example
#more schedulefile
quartz.job.manual.bonus.schedule=0 0 9 ? * *
#
it should be changed to
#more schedulefile... (5 Replies)
Discussion started by: bobby320
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5. Shell Programming and Scripting
Hi guys, I'm new to bash programming, so please pardon me.
I'm trying to replace an entry's text in Books.txt
This code works perfectly:
sed -i "s/$BookTitle/$NewBookTitle/g" Books.txt
But problem is, if there are double entries, it will also replace that entry. For example:
... (12 Replies)
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6. Shell Programming and Scripting
Hi
This is my first post and I'm just a beginner. So please be nice to me.
I have a couple of html files where a pattern beginning with "http://www.site.com" and ending with "/resource.dat" is present on every 241st line. How do I extract this to a new text file?
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7. Programming
file1
cat
dog
fish
file2
This is a bunch of lines
<!-- INSERT ANIMALS HERE -->
horse
cheetah
post results
file2
This is a bunch of lines
<!-- INSERT ANIMALS HERE -->
cat
dog
fish
horse (1 Reply)
Discussion started by: TY718
1 Replies
8. Shell Programming and Scripting
Hi,
I've a file with content as below
first_block_list{
a:5
b:3
c:8
}
new_store_list(
a:1000
b:200
c:3343
)
first_item_list{
a:10
b:20
c:30
}
second_item_list{ (1 Reply)
Discussion started by: ratheeshp
1 Replies
9. Shell Programming and Scripting
Hello.
Here is a file contents :
declare -Ax NEW_FORCE_IGNORE_ARRAY=(="§" ="§" ="§" ="§" ="§" .................. ="§"Here is a pattern
=I want to extract 'NEW_FORCE_IGNORE_ARRAY' which is the whole word before the first occurrence of pattern '='
Is there a better solution than mine :... (3 Replies)
Discussion started by: jcdole
3 Replies
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)