I just set up an ftp server with Red Hat 5.2. I am doing the work, I'm baby stepping, but it seems like every step I get stuck. Currently, I'm trying to set up a crontab job, but I'm getting the following message: /bin/sh: /usr/bin/vi: No such file or directory. I see that vi exists in /bin/vi,... (3 Replies)
Hello people,
What is the equivalent of /usr/xpg4/bin/awk on linux?
Linux has awk and gawk. But gawk is not the same as /usr/xpg4/bin/awk
thanks (1 Reply)
Hi,
I have a problem I don't understand with fuser.
I launch a simple shell script mysleep.sh:
I launch the command fuser -fu mysleep.sh but fuser doesn't return anything excepted:
mysleep:
Then I modify my script switching from #!/bin/sh to #!/bin/ksh
I launch the command fuser -fu... (4 Replies)
Hi!
All the basic linux commands, ie. echo, find, etc, are located in /bin. I have a couple of programs that have these commands pointed towards /usr/bin, ie, /usr/bin/echo (even though the actual 'echo' command is in /bin). How can I alias or redirect or link the /usr/bin to /bin just for this... (6 Replies)
hi there,
Would you able to advise that why the syntax or statement below couldn't work as expected ?
/usr/bin/find /backup -name "*tar*" -mtime +2 -exec /bin/rm -f {} \; 1> /dev/null 2>&1
In fact, I was initially located it as in crontab job, but it doesn't work at all. So, I was... (9 Replies)
Q1. I understand that /usr/local/bin means I can install/uninstall stuff in here and have any chance of messing up my original system files or effecting any other users. I created this directory myself.
But what about the directory I didn't create, namely /Users/m/bin? How is that directory... (1 Reply)
Hi Guys,
OS:- Solaris 10 64Bit
I have a small query.
On one server a user is facing sed command issue.
He gets error regarding sed for this location
/users/hoy/2999/batch5/bin/internal.sh: /usr/local/bin/sed: not found
How ever the sed is actually present at this location on server:-... (13 Replies)
Hi,
I am trying to do if inside the If in /usr/xpg4/bin/awk. But I am getting below error :
/usr/xpg4/bin/awk -v a="${THREADIDARR
}" 'BEGIN {FS="|"; n=split(a,b," "); for(i=1; i<=n; i++) c]=1;} length($3) == 0{ftag == 1{{print}}; length($3) != 0{$3 in c{ftag=1;print;} !$3 in c{ftag=0;}}'... (4 Replies)
Discussion started by: nes
4 Replies
LEARN ABOUT CENTOS
env
Env(3) User Contributed Perl Documentation Env(3)NAME
Env - perl module that imports environment variables as scalars or arrays
SYNOPSIS
use Env;
use Env qw(PATH HOME TERM);
use Env qw($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 v5.16.3 2013-03-02 Env(3)