Does anyone can write a thread to teach me how to install Windows 2000, RH Linux, and FreeBSD unix in one machine step by step? Or someone's already done with this topic? (1 Reply)
hi, all,
i saw a syntax like this
usr/local/mpiexec -np 8 /home/XXXX/program_exe >& ./temp/out
the output will be put into ./temp/out.
I want to know the meaning of the operation symbol '>&'.
Thanks (3 Replies)
Hi Everyone,
i have a string 00:44:40
so:
$tmp=~ s/://gi;
$tmp=~s/({2})({2})({2})/$1*3600+$2*60+$3/e;
the output is 2680.
Any way to combine this two lines into a single line?
Thanks (4 Replies)
When trying to use backticks for system commands, is there a way to read the error messages if a command doesn't execute properly?
I have no problem getting the results if the command is properly executed.
Ex.
my @result = `dir`;
foreach my $line (@result) {
print "Result = $line";... (2 Replies)
Am actually am new to the linux operating system and knda wana knw more about it.Please could u help me with some commands so i can start with that first.Really need your help (5 Replies)
I am trying to enter a third column in this file, but the third column should that I call "Math" perform a some math calculations based on the value found in column #2.
Here is the input file:
Here is the desired output:
Output
GERk0203078$ Levir Math
Cotete_1... (5 Replies)
I can get my AIX servers to show up in SCOM but I'm struggling with running personal scripts and have the result of these scripts show up in SCOM.
I'm currently using BigBrother and I've written some scripts for BB. I would like to convert these scripts to something that can be used in SCOM.
... (0 Replies)
Hi All,
I want to display the distinct values in the file and for each distinct value how may occurance or there.
Test data:
test1.dat
20121105
20121105
20121105
20121105
20121106
20121106
20121106
20121105
I need to display the output like
Output (2 Replies)
Discussion started by: bbc17484
2 Replies
LEARN ABOUT DEBIAN
io::tee
Tee(3pm) User Contributed Perl Documentation Tee(3pm)NAME
IO::Tee - Multiplex output to multiple output handles
SYNOPSIS
use IO::Tee;
$tee = IO::Tee->new($handle1, $handle2);
print $tee "foo", "bar";
my $input = <$tee>;
DESCRIPTION
"IO::Tee" objects can be used to multiplex input and output in two different ways. The first way is to multiplex output to zero or more
output handles. The "IO::Tee" constructor, given a list of output handles, returns a tied handle that can be written to. When written to
(using print or printf), the "IO::Tee" object multiplexes the output to the list of handles originally passed to the constructor. As a
shortcut, you can also directly pass a string or an array reference to the constructor, in which case "IO::File::new" is called for you
with the specified argument or arguments.
The second way is to multiplex input from one input handle to zero or more output handles as it is being read. The "IO::Tee" constructor,
given an input handle followed by a list of output handles, returns a tied handle that can be read from as well as written to. When
written to, the "IO::Tee" object multiplexes the output to all handles passed to the constructor, as described in the previous paragraph.
When read from, the "IO::Tee" object reads from the input handle given as the first argument to the "IO::Tee" constructor, then writes any
data read to the output handles given as the remaining arguments to the constructor.
The "IO::Tee" class supports certain "IO::Handle" and "IO::File" methods related to input and output. In particular, the following methods
will iterate themselves over all handles associated with the "IO::Tee" object, and return TRUE indicating success if and only if all
associated handles returned TRUE indicating success:
close
truncate
write
syswrite
format_write
formline
fcntl
ioctl
flush
clearerr
seek
The following methods perform input multiplexing as described above:
read
sysread
readline
getc
gets
eof
getline
getlines
The following methods can be used to set (but not retrieve) the current values of output-related state variables on all associated handles:
autoflush
output_field_separator
output_record_separator
format_page_number
format_lines_per_page
format_lines_left
format_name
format_top_name
format_line_break_characters
format_formfeed
The following methods are directly passed on to the input handle given as the first argument to the "IO::Tee" constructor:
input_record_separator
input_line_number
Note that the return value of input multiplexing methods (such as "print") is always the return value of the input action, not the return
value of subsequent output actions. In particular, no error is indicated by the return value if the input action itself succeeds but
subsequent output multiplexing fails.
EXAMPLE
use IO::Tee;
use IO::File;
my $tee = new IO::Tee(*STDOUT,
new IO::File(">tt1.out"), ">tt2.out");
print join(' ', $tee->handles), "
";
for (1..10) { print $tee $_, "
" }
for (1..10) { $tee->print($_, "
") }
$tee->flush;
$tee = new IO::Tee('</etc/passwd', *STDOUT);
my @lines = <$tee>;
print scalar(@lines);
AUTHOR
Chung-chieh Shan, ken@digitas.harvard.edu
COPYRIGHT
Copyright (c) 1998-2001 Chung-chieh Shan. All rights reserved. This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
SEE ALSO
perlfunc, IO::Handle, IO::File.
perl v5.12.3 2001-03-10 Tee(3pm)