check whether cpan is installed

[pavanponnapalli]

hi ,
I have got a shell script as under:

doct.sh

in that i have the following code

       cpan install DBI
       cpan install DBD::mysql
       .........
 

before installing DBI i need to know whether perl,cpan and ppm is existing in the linux machine or not. can anybody tell me the shell script for that as i am new to shell script.
Thanks
pavan

[micmast]

it depends on your linux distributions, most of them have excellent package managers that will allow you to do a lookup. Another options is to make the program print a version number. Or you can use a command like which, this will tell you the location of a program.

What system are you using? Or is it for any system?

[pavanponnapalli]

it depends on your linux distributions, most of them have excellent package managers that will allow you to do a lookup. Another options is to make the program print a version number. Or you can use a command like which, this will tell you the location of a program.

What system are you using? Or is it for any system?

hi,
it is for ubuntu and solaris os. please can to tell me how to write a shell code whether perl,cpan and ppm exists before the script installs the modules from cpan
regards,
pavan

[numberwhun]

hi,
it is for ubuntu and solaris os. please can to tell me how to write a shell code whether perl,cpan and ppm exists before the script installs the modules from cpan
regards,
pavan

Perl is pretty much installed by default on most Unix systems these days. If it isn't, I would be surprised.

The cpan command is part of the default Perl distribution as well. But, if you haven't used it with the particular user before, you will have to go through its setup before writing a script around it.

As for ppm, I would avoid its use as it is buggy in other than the Active State Perl distribution, which is for WIndows, and even then, I don't recommend it myself.

Regards,

Jeff