05-22-2006
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I need a sheet with the basic unix commands , and commands for VI editor. Does anyone know where i can get them. (3 Replies)
Discussion started by: Peter Spellman
3 Replies
2. Windows & DOS: Issues & Discussions
Hi.
I'm New user for this Forum.Presently i'm working with Cygwin
I want to know the basic commands that will be used for Cygwin.
Can anyone guide me on this regards
Thanks & Regards
Sanjay (0 Replies)
Discussion started by: sanjay.karthik
0 Replies
3. UNIX for Dummies Questions & Answers
how do I make my arrow keys behave like they are on DOS.
ALSO i need editing on command promt like it is on DOS on my UNIX prompt
can anyone help pl.. (11 Replies)
Discussion started by: spotnis
11 Replies
4. UNIX for Dummies Questions & Answers
I would be thankful if anyone could show me commands to do the following tasks in vi:1) How can I undo or redo my last action in vi editor.
2) How can I copy only a word or a portion of line (not the whole line) in vi, like
we can select text and press ctrl+c in notepad to copy any text.
3)... (4 Replies)
Discussion started by: nervous
4 Replies
5. UNIX for Dummies Questions & Answers
Howdie everyone...
I have a shell script RemoveFiles.sh
Inside this file, it only has two commands as below:
rm -f ../../reportToday/temp/*
rm -f ../../report/*
My problem is that when i execute this script, nothing happened. Files remained unremoved. I don't see any error message as it... (2 Replies)
Discussion started by: cheongww
2 Replies
6. UNIX for Dummies Questions & Answers
I need to be able to look up a file system with the inode number 214743 and, get its absolute reference in a single line...
I have tried..
"find / -inum 214743 -print" (1 Reply)
Discussion started by: blankets3
1 Replies
7. UNIX for Dummies Questions & Answers
Hello there
Been using Unix bash scripting for two days now so am very new to this. I am currently doing a project now and i'm basically making a noughts and crosses game (or tic tac toe).
I have created the board using an array. When I try and check to see if the array is empty using an If... (3 Replies)
Discussion started by: ChrisHoogie
3 Replies
8. UNIX for Advanced & Expert Users
Urgent Help - I have a problem, I need to know how to print a count of files from a specific date that passed and that failed. Additionally, print the name of the files located on the date, print a list of all dates during which a file with a name like 'test' was processed, and then determine... (5 Replies)
Discussion started by: AJ 49er
5 Replies
9. Programming
Hello!
This is my first post, and I just learned what UNIX was this week. For a JAVA programming class I am taking, I must be able to create a directory in UNIX, use the nano command to create a JAVA program, compile it, and then run it on the command prompt using the java command.
For some... (5 Replies)
Discussion started by: UNdvoItX
5 Replies
10. UNIX for Beginners Questions & Answers
In a Redhat Linux environment, I could run salt commands on the $ prompt but not inside my bash scripts.
It will say command not found and the $PATH variable is exactly the same outside and inside the script.
!#/usr/bin/bash
echo “running”¯
salt "*" cmd.run ‘ls'
exit
Output:-... (8 Replies)
Discussion started by: gurudewa
8 Replies
Env(3pm) Perl Programmers Reference Guide Env(3pm)
NAME
Env - perl module that imports environment variables as scalars or arrays
SYNOPSIS
use Env;
use Env qw(PATH HOME TERM);
use Env qw($SHELL @LD_LIBRARY_PATH);
DESCRIPTION
Perl maintains environment variables in a special hash named %ENV. For when this access method is inconvenient, the Perl module "Env"
allows environment variables to be treated as scalar or array variables.
The "Env::import()" function ties environment variables with suitable names to global Perl variables with the same names. By default it
ties all existing environment variables ("keys %ENV") to scalars. If the "import" function receives arguments, it takes them to be a list
of variables to tie; it's okay if they don't yet exist. The scalar type prefix '$' is inferred for any element of this list not prefixed by
'$' or '@'. Arrays are implemented in terms of "split" and "join", using $Config::Config{path_sep} as the delimiter.
After an environment variable is tied, merely use it like a normal variable. You may access its value
@path = split(/:/, $PATH);
print join("
", @LD_LIBRARY_PATH), "
";
or modify it
$PATH .= ":.";
push @LD_LIBRARY_PATH, $dir;
however you'd like. Bear in mind, however, that each access to a tied array variable requires splitting the environment variable's string
anew.
The code:
use Env qw(@PATH);
push @PATH, '.';
is equivalent to:
use Env qw(PATH);
$PATH .= ":.";
except that if $ENV{PATH} started out empty, the second approach leaves it with the (odd) value "":."", but the first approach leaves it
with ""."".
To remove a tied environment variable from the environment, assign it the undefined value
undef $PATH;
undef @LD_LIBRARY_PATH;
LIMITATIONS
On VMS systems, arrays tied to environment variables are read-only. Attempting to change anything will cause a warning.
AUTHOR
Chip Salzenberg <chip@fin.uucp> and Gregor N. Purdy <gregor@focusresearch.com>
perl v5.12.1 2010-04-26 Env(3pm)