06-21-2013
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10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I need a hand with this simple script,
in Unix i have a variable called portal:
$ echo $portal
chu0
when i use awk this variable is not recognized. How can i make awk recognize and print the value of this variable, since the output is not shown i.e.
awk '
BEGIN {printf("%4s\t%14s\n",... (3 Replies)
Discussion started by: alexcol
3 Replies
2. Shell Programming and Scripting
when I execute this awk stmt ..
awk "/log_directory/ { print $5}" /opt/dba/oraadmin/tools/tmp_purge_op.log
it's returning the whole line as ..
IRMD118_LISTENER1 parameter "log_directory" set to /opt/oracle/10.2/network/log/
my expected output is : /opt/oracle/10.2/network/log
what... (7 Replies)
Discussion started by: talashil
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3. Shell Programming and Scripting
Whats the syntax to find all lines that matches a text and print out specific fields after the match?
ex:
1: some random text
2: Full name: John E. Smith
3: some random text
4: Full name: Mary J. Lue
5: some random text
So I'd like to print out First names or last names or everything... (2 Replies)
Discussion started by: linuxdude
2 Replies
4. Shell Programming and Scripting
Hi,
I just don't understand awk. I think I'm close here but can someone give me a hand to finish this little parsing routine ?
the input file is formatted like this:
District 2502110
Gsub 2384889
Gsub 1428180
District 2502220
Gsub 1466390
Gsub 1466389
Gsub 1466388
Gsub 1466386
Gsub... (4 Replies)
Discussion started by: fwellers
4 Replies
5. UNIX for Dummies Questions & Answers
awk '!_++'
Most importantly, I want to know what the underscore does "!_"
But ideally, please breakdown the whole thing. It is supposed to remove duplicate lines when found in a file. (1 Reply)
Discussion started by: glev2005
1 Replies
6. Shell Programming and Scripting
Hello;
Trying to figure out how to keep just the contents between the two search lines:
awk '/regexp_1/ ,/regexp_2/'
I do not want lines containing regexp_1 and regexp_2 in the output.
Thank you for any ideas
Video tutorial on how to use code tags in The UNIX and Linux Forums. (5 Replies)
Discussion started by: delphys
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7. Shell Programming and Scripting
Hello;
I need to print two previous lines after searching for a reg exp:
awk '/haywood/'
should produce the following
===================
p9J46THe020804 89922 Tue Oct 18 21:06 MAILER-DAEMON
(host map: lookup (haywood.com): deferred)
... (1 Reply)
Discussion started by: delphys
1 Replies
8. Shell Programming and Scripting
Hi,
I'm new to AWK and I'm having problems comparing a field to a string variable.
/ARTIST/ {x = $2}
$1 ~ x {print $0}My code tries to find a record with the string "ARTIST". Once it finds it, it stores the second field of the record into a variable. I don't know what the problem is for the... (7 Replies)
Discussion started by: klusps
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9. Shell Programming and Scripting
Hi,
I have a file such that:
40454,31,48,4,1304.967741935484,1
31708,25,48,4,1268.32,1
20900,64501,671,788,0.3240259840932699,0
20137,51358,834,743,0.3920908135051988,0
I want to replace the 6th column by "ones" if it is 1, and with "zeros" if it is 0.
Thanks. (6 Replies)
Discussion started by: shekhar2010us
6 Replies
10. Shell Programming and Scripting
Hi, this must be a simple but this is my first interaction with shell and awk.
following is a log file needed to parse (2 lines separated by a line break for clarity):
2013-07-27 13:32:09,043 - ERROR - PerformanceUtility - Thread-14 - Performance - 9b348407-4f57-4983-a057-a55669821f68 |... (12 Replies)
Discussion started by: liv2luv
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LEARN ABOUT REDHAT
wrjpgcom
WRJPGCOM(1) General Commands Manual WRJPGCOM(1)
NAME
wrjpgcom - insert text comments into a JPEG file
SYNOPSIS
wrjpgcom [ -replace ] [ -comment text ] [ -cfile name ] [ filename ]
DESCRIPTION
wrjpgcom reads the named JPEG/JFIF file, or the standard input if no file is named, and generates a new JPEG/JFIF file on standard output.
A comment block is added to the file.
The JPEG standard allows "comment" (COM) blocks to occur within a JPEG file. Although the standard doesn't actually define what COM blocks
are for, they are widely used to hold user-supplied text strings. This lets you add annotations, titles, index terms, etc to your JPEG
files, and later retrieve them as text. COM blocks do not interfere with the image stored in the JPEG file. The maximum size of a COM
block is 64K, but you can have as many of them as you like in one JPEG file.
wrjpgcom adds a COM block, containing text you provide, to a JPEG file. Ordinarily, the COM block is added after any existing COM blocks;
but you can delete the old COM blocks if you wish.
OPTIONS
Switch names may be abbreviated, and are not case sensitive.
-replace
Delete any existing COM blocks from the file.
-comment text
Supply text for new COM block on command line.
-cfile name
Read text for new COM block from named file.
If you have only one line of comment text to add, you can provide it on the command line with -comment. The comment text must be sur-
rounded with quotes so that it is treated as a single argument. Longer comments can be read from a text file.
If you give neither -comment nor -cfile, then wrjpgcom will read the comment text from standard input. (In this case an input image file
name MUST be supplied, so that the source JPEG file comes from somewhere else.) You can enter multiple lines, up to 64KB worth. Type an
end-of-file indicator (usually control-D) to terminate the comment text entry.
wrjpgcom will not add a COM block if the provided comment string is empty. Therefore -replace -comment "" can be used to delete all COM
blocks from a file.
EXAMPLES
Add a short comment to in.jpg, producing out.jpg:
wrjpgcom -c "View of my back yard" in.jpg > out.jpg
Attach a long comment previously stored in comment.txt:
wrjpgcom in.jpg < comment.txt > out.jpg
or equivalently
wrjpgcom -cfile comment.txt < in.jpg > out.jpg
SEE ALSO
cjpeg(1), djpeg(1), jpegtran(1), rdjpgcom(1)
AUTHOR
Independent JPEG Group
15 June 1995 WRJPGCOM(1)