Sponsored Content
Full Discussion: Change directory error
Top Forums Shell Programming and Scripting Change directory error Post 302925057 by drl on Thursday 13th of November 2014 04:37:57 PM
Old 11-13-2014
Hi.
Quote:
Originally Posted by cmccabe
Thank you all for the great suggestions and ideas, I have a lot to learn
Yes, practice. It would probably be useful to look over some books. The page at Perl - Programming - Books & Videos - O'Reilly Media lists an abundance of books.

An older list for scientific computing is available at recommendations on scientific computing with Perl

If you write a lot of perl, look into the utility perltidy, it will save you many times over. Always look in your repositories for perl codes, there are a ton of libraries available. You might find some things at The Comprehensive Perl Archive Network - www.cpan.org that are useful. I never install anything in my system unless I use the package manager (apt-get, yum zypper, etc), but rather I put codes in ~/bin, and ~/executable.

We used O'Reilly books in the perl classes I taught. You are out of the beginner state when you have written 100 non-trivial programs ( drl's rule Smilie ) I'd recommend Learning, Intermediate, and Mastering for a full course. You didn't say what your field is, but if it's the life sciences, then the Bioinformatics might be useful.

A few books from publisher Manning are also useful, Data Munging, and OO perl.

However, before you start on this, you may wish to compare perl and Python, say from The Fall Of Perl, The Web's Most Promising Language

Best wishes ... cheers, drl
This User Gave Thanks to drl For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

change directory

Hi all, I'm trying to wirte a small shell script in Linux. My script has the flow like, cmd1 cmd2 cd testdata cmd3 After exiting the program, the CWD remains the same as where I execute the program. I need it to be changed to the latest updated directory in the program. How can I do... (1 Reply)
Discussion started by: vadivel
1 Replies

2. Shell Programming and Scripting

change directory

hi, Iam in directory A. I run a script from there. inside the script i have a command cd B. When i come out of the script directory is A only. Even when i come out scrip i want the directory to be B How to achieve (2 Replies)
Discussion started by: mkan
2 Replies

3. Shell Programming and Scripting

Change Directory via a script?

I would like to have a script that would change my current working directory. However, any time I execute a 'cd' command in a script, it holds only for the life of that script -- the working directory on exit is the same as when the script was initiated. Is it possible to have the script return... (3 Replies)
Discussion started by: George Borrmann
3 Replies

4. UNIX for Dummies Questions & Answers

Change Directory

I have a directory that is existing under my root dir of the FTP server. The DIR name is 'Software Patch'. I want to move in to that DIR to download some patches. But, when I issued a command 'cd SOftware Patch', the system said that it cannot find the dir 'Software'. I tried all possible ways like... (2 Replies)
Discussion started by: vskr72
2 Replies

5. Shell Programming and Scripting

Change all filenames in a directory

I have a directory of files and each file has a random 5 digit string at the beginning that needs to be removed. Plus, there are some files that will be identically named after the 5 digit string is removed and I want those eliminated or moved. any ideas? (17 Replies)
Discussion started by: crumb
17 Replies

6. Shell Programming and Scripting

change directory if available

I have a simple shell script that prompts the user to enter a directory to navigate to. What i want it to do and i don't know how to do this is if the directory is invalid automatically navigate to the home directory. echo "enter a directory to navigate to:" read directory cd $directory... (6 Replies)
Discussion started by: icelated
6 Replies

7. UNIX for Dummies Questions & Answers

How to change database directory to another directory?

Hi, I Installed mysql on my CentOS 6.2 Server. But when I tried to change the location of /var/lib/mysql to another directory. I can't start the mysql. Below is what I've done yum install mysql mysql-server mysql-devel mkdir /path/to/new/ cp -R /var/lib/mysql /path/to/new chown -R... (1 Reply)
Discussion started by: ganitolngyundre
1 Replies

8. Shell Programming and Scripting

Change to directory and search some file in that directory in single command

I am trying to do the following task : export ENV=aaa export ENV_PATH=$(cd /apps | ls | grep $ENV) However, it's not working. What's the way to change to directory and search some file in that directory in single command Please help. (2 Replies)
Discussion started by: saurau
2 Replies

9. Shell Programming and Scripting

Change Directory

Hi All, There is a code like below in my script ############################################### ###Create Directories and Sub-Directories ############################################### dpdir=DP_FROM_${from}_TO_${to} mkdir $dpdir cd $dpdir mkdir AWQM WFCONTROLLER PROVCO PRISM ... (1 Reply)
Discussion started by: pvmanikandan
1 Replies

10. Shell Programming and Scripting

Change directory shell

#!/bin/bash echo -n "Enter number of sanger patients : "; read id perl -ne 'chomp; system ("perl table_annovar.pl $_ humandb/ -buildver hg19 -protocol refGene,popfreq_all,common,clinvar,clinvarsubmit,clinvarreference -operation g,f,f,f,f,f -otherinfo")' < file.txt I have the above script... (7 Replies)
Discussion started by: cmccabe
7 Replies
URI::URL(3pm)						User Contributed Perl Documentation					     URI::URL(3pm)

NAME
URI::URL - Uniform Resource Locators SYNOPSIS
$u1 = URI::URL->new($str, $base); $u2 = $u1->abs; DESCRIPTION
This module is provided for backwards compatibility with modules that depend on the interface provided by the "URI::URL" class that used to be distributed with the libwww-perl library. The following differences exist compared to the "URI" class interface: o The URI::URL module exports the url() function as an alternate constructor interface. o The constructor takes an optional $base argument. The "URI::URL" class is a subclass of "URI::WithBase". o The URI::URL->newlocal class method is the same as URI::file->new_abs. o URI::URL::strict(1) o $url->print_on method o $url->crack method o $url->full_path: same as ($uri->abs_path || "/") o $url->netloc: same as $uri->authority o $url->epath, $url->equery: same as $uri->path, $uri->query o $url->path and $url->query pass unescaped strings. o $url->path_components: same as $uri->path_segments (if you don't consider path segment parameters) o $url->params and $url->eparams methods o $url->base method. See URI::WithBase. o $url->abs and $url->rel have an optional $base argument. See URI::WithBase. o $url->frag: same as $uri->fragment o $url->keywords: same as $uri->query_keywords o $url->localpath and friends map to $uri->file. o $url->address and $url->encoded822addr: same as $uri->to for mailto URI o $url->groupart method for news URI o $url->article: same as $uri->message SEE ALSO
URI, URI::WithBase COPYRIGHT
Copyright 1998-2000 Gisle Aas. perl v5.14.2 2012-02-11 URI::URL(3pm)
All times are GMT -4. The time now is 10:07 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy