In awk, I'd like to check if a field is blank.
And by blank I mean, the field could be "" or " "
In other words, the field could either be empty, or be filled with spaces.
Would the regex look like this?
$5 ~ // { Action }?
What other ways are there?
Hmm.. in any case I think... (7 Replies)
I have a pipe delimited file. I need to check that the first and second fields are 5 characters long and if not i need to append 0 in front of them to make them 5 characters long. can some body let mwe know how i can find the length of the two fields and then make them 5 characters long if they... (6 Replies)
Hi All ,
I am trying to build a script using awk that checks columns of the înput file and displays message if the column length exceeds 35 char.
i have tried the below code but it does not work properly (2 Replies)
Hello Everyone,
I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table.
Input Data-
------ ------------------------ ---- -----------------
WFI001 Xxxxxx Control Work Item A Number of Records
------ ------------------------... (5 Replies)
Hi,
I have a issue, I need to loop through a comma delimited file and check for the length which exceeds specified length , if Yes truncate the string.
But my problem is , I do not have to check for all the fields and the field lenght is not same for all the fields.
For ex:
Say my line... (9 Replies)
Hi all,
I have a requirement to replace a field with a character as per the length of the field.
Suppose i have a file where second field is of 20 character length. I want to replace second field with 20 stars (*). like ********************
As the field is not a fixed one, i want to do the... (2 Replies)
I have several questions about using awk. I'm hoping someone could lend me a hand. (I'm also hoping that my questions make sense.)
I have a file that contains pipe separated data. Each line has similar data but the number of fields and the field position on each line is variable. ... (3 Replies)
The awk below using the sample input would output the following: Basically, it averages the text in $5 that matches if $7 < 30 .
awk '{if(len==0){last=$5;total=$7;len=1;getline}if($5!=last){printf("%s\t%f\n", last,... (6 Replies)
The awk below produces the current output, which will add +1 to $3. However, I am trying to add the length of the matching characters between $5 and $6 to $3. I have tried using sub as a variable to store the length but am not able to do so correctly. I added comments to each line and the... (4 Replies)
Discussion started by: cmccabe
4 Replies
LEARN ABOUT DEBIAN
app::clusterssh::host
App::ClusterSSH::Host(3pm) User Contributed Perl Documentation App::ClusterSSH::Host(3pm)NAME
ClusterSSH::Host - Object representing a host.
SYNOPSIS
use ClusterSSH::Host;
my $host = ClusterSSH::Host->new({
hostname => 'hostname',
});
my $host = ClusterSSH::Host->parse_host_string('username@hostname:1234');
DESCRIPTION
Object representing a host. Include details to contact the host such as hostname/ipaddress, username and port.
METHODS
$host=ClusterSSH::Host->new ({ hostname => 'hostname' })
Create a new host object. 'hostname' is a required arg, 'username' and 'port' are optional. Raises exception if an error occurs.
$host->get_hostname
$host->get_username
$host->get_port
$host->get_master
Return specific details about the host
$host->set_username
$host->set_port
$host->set_master
Set specific details about the host after its been created.
get_realname
If the server name provided is not an IP address (either IPv4 or IPv6) attempt to resolve it and retun the discovered names.
get_givenname
Alias to get_hostname, for use when " get_realname " might return something different
parse_host_string
Given a host string, returns a host object. Parses hosts such as
check_ssh_hostname
Check the objects hostname to see whether or not it may be configured within the users $HOME/.ssh/config configuration file
host
192.168.0.1
user@host
user@192.168.0.1
host:port
[1234:1234:1234::4567]:port
1234:1234:1234::4567
and so on. Cope with IPv4 and IPv6 addresses - raises a warning if the IPv6 address is ambiguous (i.e. in the last example, is the
4567 part of the IPv6 address or a port definition?) and assumes it is part of address. Use brackets to avoid seeing warning.
AUTHOR
Duncan Ferguson, "<duncan_j_ferguson at yahoo.co.uk>"
LICENSE AND COPYRIGHT
Copyright 1999-2010 Duncan Ferguson.
This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as
published by the Free Software Foundation; or the Artistic License.
See http://dev.perl.org/licenses/ for more information.
perl v5.14.2 2012-06-24 App::ClusterSSH::Host(3pm)