[gradsusr] Opening a Grb2 File

[Eric Altshuler]

Another way to make sure the shell finds the g2ctl script is to execute it using either an absolute path, for example: 


/path/to/scripts/g2ctl 


or with a relative path, e.g. if g2ctl is in the current directory: 


./g2ctl 


Also, make sure the file 'g2ctl' has owner execute permission. Sometimes, when downloading an executable file from the internet, the local file does not have execute permission. To make sure it does, do this: 


chmod u+x g2ctl 


There are other possible issues, such as where perl is installed on your system. If it's not where the script is looking for it, there will be an error. Hopefully this won't happen. 


Eric 

----- Original Message -----
From: "Aaron @ LSC Perry" <Aaron.Perry at lsc.vsc.edu> 
To: "GrADS Users Forum" <gradsusr at gradsusr.org> 
Sent: Thursday, January 16, 2014 7:45:22 PM 
Subject: Re: [gradsusr] Opening a Grb2 File 


Ethan, 

You must first tell your bash what g2ctl is and where it is located. 

Open up a new terminal and type "gedit .bashrc" 

>From there, set an alias for g2ctl (including the absolute path to where it's located in your filesystem) 

Then exit out of the terminal and try running g2ctl again and see if it works. 











Onward and Upward, 

Aaron D. Perry 
Boston, MA 
Lyndon State College '16 
Twitter: @AaronPerryLSC 
Mobile: 617-780-4312 


From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on behalf of Ethan Sacoransky [ethan.saco at me.com] 
Sent: Thursday, January 16, 2014 7:05 PM 
To: GrADS Users Forum 
Subject: Re: [gradsusr] Opening a Grb2 File 




Hey Eric, Unfortunately, this command is still not working in a basic terminal shell. Here is what I put through: 'g2ctl grib2_gfs_4_20140112_1200_009.grb2 > grib2_gfs_4_20140112_1200_009.ctl' and this is the error I am getting: '-bash: g2ctl: command not found'. Any thoughts on this would be much appreciated. 
Thanks, 
Ethan 


On 2014-01-16, at 6:52 PM, Eric Altshuler wrote: 




Hi Ethan, 


The g2ctl is a perl script, not a grads command. You have to run it from the shell command line, not inside grads. 


Best regards, 


Eric L. Altshuler 
Research Scientist 
Center for Ocean-Land-Atmosphere Studies 
253 Research Hall, Mail Stop 6C5 
George Mason University 
4400 University Drive 
Fairfax, VA 22030 USA 

E-mail: ela at cola.iges.org 
Phone: (703) 993-5725 
Fax: (703) 993-5770 

----- Original Message -----
From: "Ethan Sacoransky" < ethan.saco at me.com > 
To: "GrADS Users Forum" < gradsusr at gradsusr.org > 
Sent: Thursday, January 16, 2014 6:50:55 PM 
Subject: Re: [gradsusr] Opening a Grb2 File 

Hi Aaron, 
I am attempting to carry out this process by typing in 'g2ctl gfs_4_20140112_1200_009.grb2 > gfs_4_20140112_1200_009.ctl'. I got an error saying 'unknown command: g2ctl'. Any thoughts on this? Thanks so much. 

Ethan 

On 2014-01-16, at 6:39 PM, Perry, Aaron @ LSC wrote: 

> Hi Ethan, 
> 
> In order to open a grib2 file in GrADS, a control (.ctl) and an index (.idx) file must exist. 
> 
> To create a .ctl file with g2ctl, use this command in your terminal: 
> 
> g2ctl grib2_file.grb2 > grib2_file.ctl 
> 
> Then to create the .idx file with gribmap, use this command: 
> 
> gribmap -i grib2_file.ctl 
> 
> 
> Onward and Upward, 
> 
> Aaron D. Perry 
> Boston, MA 
> Lyndon State College '16 
> Twitter: @AaronPerryLSC 
> Mobile: 617-780-4312 
> 
> ________________________________________ 
> From: gradsusr-bounces at gradsusr.org [ gradsusr-bounces at gradsusr.org ] on behalf of Ethan Sacoransky [ ethan.saco at me.com ] 
> Sent: Thursday, January 16, 2014 6:23 PM 
> To: gradsusr at gradsusr.org 
> Subject: [gradsusr] Opening a Grb2 File 
> 
> Good evening everyone, 
> 
> In an attempt to open up a grib2 file, I have downloaded and unpacked the wgrib2 tar file and copied the g2ctl script onto a text edit file. When I type in the command 'run g2ctl gfs_4_20140112_1200_009.grb2' I get the prompt, "error opening script file: g2ctl". Any thoughts on why this would be? 
> 
> Ethan 
> 
> 
> _______________________________________________ 
> gradsusr mailing list 
> gradsusr at gradsusr.org 
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> 
> _______________________________________________ 
> gradsusr mailing list 
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