Hi folks,
Please advise which command/command line shall I run;
1) to display the command and its output on console
2) simultaneous to save the command and its output on a file
I tried tee command as follows;
$ ps aux | grep mysql | tee /path/to/output.txt
It displayed the... (7 Replies)
Hey guys,
I'm trying to merge the output from the ps and top commands; since I need the full command used (only showed in the ps), and the cpu usage with some decimal numbers (i.e.: 0.05%, only showed in top).
After exporting to different files, I was thinking of doing an egrep with the... (0 Replies)
I have a Bourne Shell script that is normally run as a background job and redirects it's output to a file internally (using exec >>); I use "set -x" to capture each command which provides me with a nice shell execution log if it all goes to pieces.
I now also need to be able to also run this as... (4 Replies)
Hi,
I've a shell that uses two sed commands to tailor a file.
sed 's/ */ /g' | sed 's/%/%%/g'
Is it possible to merge this in to a single sed?
Thanks! (2 Replies)
Hello folks,
I would like ask for a help in one script I'm currently working on.
Main goal is to compare size of file available on remote site and file already downloaded (check if downloaded file is complete and non corrupted).
# Check if files were downloaded correctly
for FILES in... (6 Replies)
Hi All,
I am creating an XLS using unix which fetches the data from database.
In the first row i have 2 columns which i want to merge. Is it possible to merge the columns using unix command?
Thanks,
Sashanka (1 Reply)
I am using UNIX to create a script on our system. I have setup my commands to append their output to an outage file. However, some of the commands return no output and so I would like something to take their place.
What I need
The following command is placed at the prompt:
TICLI... (4 Replies)
I am trying to run 2 sets of commands but want their output in a particular format.
The 2 commands are :
md5sum $WAR_DIR/$war
and
java -jar $WAR_DIR/$war | grep build.release.version | awk '{print $3}'
The first command gives an output of
5f5261a33b92a36f80218cf14e8271ad ... (4 Replies)
Discussion started by: Junaid Subhani
4 Replies
LEARN ABOUT DEBIAN
devel::dwarn
Devel::Dwarn(3pm) User Contributed Perl Documentation Devel::Dwarn(3pm)NAME
Devel::Dwarn - return Dwarn @return_value
SYNOPSIS
use Devel::Dwarn;
return Dwarn some_call(...)
is equivalent to:
use Data::Dumper::Concise;
if (wantarray) {
my @return = some_call(...);
warn Dumper(@return);
return @return;
} else {
my $return = some_call(...);
warn Dumper($return);
return $return;
}
but shorter. If you need to force scalar context on the value,
use Devel::Dwarn;
return DwarnS some_call(...)
is equivalent to:
use Data::Dumper::Concise;
my $return = some_call(...);
warn Dumper($return);
return $return;
If you need to force list context on the value,
use Devel::Dwarn;
return DwarnL some_call(...)
is equivalent to:
use Data::Dumper::Concise;
my @return = some_call(...);
warn Dumper(@return);
return @return;
If you want to label your output, try DwarnN
use Devel::Dwarn;
return DwarnN $foo
is equivalent to:
use Data::Dumper::Concise;
my @return = some_call(...);
warn '$foo => ' . Dumper(@return);
return @return;
If you want to output a reference returned by a method easily, try $Dwarn
$foo->bar->{baz}->$Dwarn
is equivalent to:
my $return = $foo->bar->{baz};
warn Dumper($return);
return $return;
If you want to immediately die after outputting the data structure, every Dwarn subroutine has a paired Ddie version, so just replace the
warn with die. For example:
DdieL 'foo', { bar => 'baz' };
TIPS AND TRICKS
global usage
Instead of always just doing:
use Devel::Dwarn;
Dwarn ...
We tend to do:
perl -MDevel::Dwarn foo.pl
(and then in the perl code:)
::Dwarn ...
That way, if you leave them in and run without the "use Devel::Dwarn" the program will fail to compile and you are less likely to check it
in by accident. Furthmore it allows that much less friction to add debug messages.
method chaining
One trick which is useful when doing method chaining is the following:
my $foo = Bar->new;
$foo->bar->baz->Devel::Dwarn::DwarnS->biff;
which is the same as:
my $foo = Bar->new;
(DwarnS $foo->bar->baz)->biff;
SEE ALSO
This module is really just a shortcut for Data::Dumper::Concise::Sugar, check it out for more complete documentation.
perl v5.10.1 2011-01-20 Devel::Dwarn(3pm)