Cannot execute Unix command in a simple perl script Post: 302558452

Sponsored Content

Top Forums Shell Programming and Scripting Cannot execute Unix command in a simple perl script Post 302558452 by jayachandran87 on Friday 23rd of September 2011 03:07:43 PM

09-23-2011

Registered User

Thanks for your response..

Code:

$ vgdisplay vgesar | grep -i 'Free PE' | awk '{print $NF}'
69

As i said am just starting with perl. this is one block. Am trying to use perl, as i ll have difficulties comparing floating point values in shell script.

I have already tested this with shell script and works fine. but i just want to know why the same unix command gives the same result as executed in a shell script

---------- Post updated at 12:37 AM ---------- Previous update was at 12:35 AM ----------

As requested by you am pasting the vgdisplay $A

$A here is vgesar -> vgdisplay vgesar

Code:

$ vgdisplay vgesar
--- Volume groups ---
VG Name                     /dev/vgesar
VG Write Access             read/write
VG Status                   available, exclusive
Max LV                      255
Cur LV                      1
Open LV                     1
Max PV                      100
Cur PV                      2
Act PV                      2
Max PE per PV               1599
VGDA                        4
PE Size (Mbytes)            32
Total PE                    3198
Alloc PE                    3129
Free PE                     69
Total PVG                   0
Total Spare PVs             0
Total Spare PVs in use      0

Last edited by Scott; 09-23-2011 at 04:22 PM.. Reason: Code tags...

jayachandran87

View Public Profile for jayachandran87

Find all posts by jayachandran87

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Net::SSH::Perl->Execute any unix command & display the output in a proper form

Net::SSH::Perl ...... how to print the output in a proper format my $cmd = "ls -l"; my $ssh = Net::SSH::Perl->new($host); $ssh->login($user, $pass); my($stdout, $stderr, $exit) = $ssh->cmd("$cmd"); print $stdout; the script works fine, but i am unable to see the output...

2. Shell Programming and Scripting

Execute in unix not in PERL

Hi All, This below command is working fine with unix box. However i could not able to run it in PERL. kidly suggest??? perl -ne '{push @x, $_}END{pop(@x); print @x}' create2.txt

3. Shell Programming and Scripting

perl/unix: script in command line works but not in perl

so in unix this command works works and shows me a list of directories find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt but when i try running a perl script to run this command my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';...

4. Shell Programming and Scripting

how to execute ksh simple shell script without creating .sh file

please help me to execute a simple shell script like for i in `ls echo $i done . i dont want to create a new sh file to execute it. Can i just type and execute it ? because I always this kind of simple for loops . Please help . Thanks

5. Shell Programming and Scripting

Help making simple perl or bash script to create a simple matrix

Hello all! This is my first post and I'm very new to programming. I would like help creating a simple perl or bash script that I will be using in my work as a junior bioinformatician. Essentially, I would like to take a tab-delimted or .csv text with 3 columns and write them to a "3D" matrix: ...

6. Shell Programming and Scripting

execute ssh command via perl

Hi I have a perl command that doesn't seem to be working correctly. It appears to be fine but even when i try and run it manually same thing. Can someone take a look at this and tell me what they think the problem could be? Here is the perl Line: system ("echo 'ssh -t -t $user\@$_ \"cd...

7. UNIX for Dummies Questions & Answers

Execute a command in different directory through Unix Script

Hi Gurus, I have the below requirement, Execute an unix script which will pick the latest file from the archive directory and do a grep (on multiple patterns) on that file. processingDir="/usr/apps/irdc/informatica/spsf_sales/TgtFiles/ARCHIVE" filename = 'ls Check* | sort -n -k 2 |...

8. Shell Programming and Scripting

Using UNIX command in perl script.

I wish to know if there is any limitation in using unix commands in perl script or it is just we should avoid using them in our perl script. For e.g Below is the command to get the recent file in a dir.: $lcsvFile = `cd "$l_inputfilepath";ls -1t *.CSV|tail -1` Is there any harm in coding...

9. Linux

How to execute a simple select script using a shell script?

Hi team, I have two select statements and need to run them using SYSDBA user select * from temp_temp_seg_usage; select segment_name, tablespace_name, bytes/ (1024*1024) UsedMb from dba_segments where segment_name='TEMP_TEMP_SEG_USAGE'; Need to run this using a shell script say named...

10. Programming

PERL: In a perl-scripttTrying to execute another perl-script that SETS SOME VARIABLES !

I have reviewed many examples on-line about running another process (either PERL or shell command or a program), but do not find any usefull for my needs way. (Reviewed and not useful the system(), 'back ticks', exec() and open()) I would like to run another PERL-script from first one, not...

LEARN ABOUT DEBIAN

build-lives-rfx-plugin

build-lives-rfx-plugin(1)				      General Commands Manual					 build-lives-rfx-plugin(1)

NAME

       build-lives-rfx-plugin - builds rendered effects for LiVES

SYNOPSIS

       build-lives-rfx-plugin script_name [plugin_dir] -get section file

DESCRIPTION

       This perl script is used by LiVES to compile an RFX (rendered effect) plugin for LiVES. It is generally called from build-lives-rfx-plugin-
       multi for a script which has a language code representing LiVES-perl. The script_name must be  the  full  (absolute)  path  to  the  plugin
       script,	and  plugin_dir  can  be  used to specify the output directory where the compiled plugin should be generated. If plugin_dir is not
       defined then /tmp is assumed.

       The second variant with -get is used to print out a script section from a plugin script to stdout. It is generally only used internally	by
       LiVES.

       Return values The script returns the following values

       0 - success 1 - the value of a trigger was greater than the number of parameters 2 - a value could not be read from the script file 3 - the
       language code of the plugin script was not equivalent to LiVES-perl 4 - the API version level of the plugin script  was	invalid  5  -  the
       <define> section was missing from the plugin script

SEE ALSO

       build-lives-rfx-plugin-multi(1), lives(1)

AUTHOR

       Gabriel Finch a.k.a Salsaman (salsaman@xs4all.nl)

								    May 9 2010						 build-lives-rfx-plugin(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Net::SSH::Perl->Execute any unix command & display the output in a proper form

Discussion started by: gsprasanna

2. Shell Programming and Scripting

Execute in unix not in PERL

Discussion started by: adaleru

3. Shell Programming and Scripting

perl/unix: script in command line works but not in perl

Discussion started by: kpddong

4. Shell Programming and Scripting

how to execute ksh simple shell script without creating .sh file

Discussion started by: Sooraj_Linux