How to run perl script on Ubuntu?
How to run this script
https://zwitterion.org/software/aggregate-cidr-addresses/
I’ve created the file aggregate-cidr-addresses as shown in the example.
I’ve copied the file from the server in the same directory
then I run as shown in the example
root#Ubuntu:~$ list-iana-reserved-ranges | aggregate-cidr-addresses
list-iana-reserved-ranges: ukaz ni bil najden (translate command not found)
aggregate-cidr-addresses: ukaz ni bil najden (translate command not found)
and also
root#Ubuntu:~$ perl list-iana-reserved-ranges | aggregate-cidr-addresses
Number found where operator expected at list-iana-reserved-ranges line 2, near "192.168.1.0"
(Missing semicolon on previous line?)
syntax error at list-iana-reserved-ranges line 2, near "192.168.1.0"
Execution of list-iana-reserved-ranges aborted due to compilation errors.
aggregate-cidr-addresses: ukaz ni bil najden (translate command not found)
I've got
command not found
How to run this properly?
To run a Perl script,
put the interpreter in the first line of the files with a "shabang" or "hash bang" (#!), which the script you linked to already has:
#!/usr/bin/perl
make the files executable:
chmod +x list-iana-reserved-ranges aggregate-cidr-addresses
add ./ to the beginning of the filenames (this is a Linux security feature to not accidentally run scripts in your current directory):
./list-iana-reserved-ranges | ./aggregate-cidr-addresses
Related
I am super new to command line and am following this yt video - https://www.youtube.com/watch?v=MBBWVgE0ewk&list=PL6gx4Cwl9DGDV6SnbINlVUd0o2xT4JbMu
I am having trouble cd and .. to directories as the above tutorial does. I get thrown an error saying that the directory does not exist or the ..is not a recognized command.
This is really putting me off cl as its only the first step towards using cl.
My command line
I wrote a perl script that runs command strings using the system perl command. And under Windows 10, when it comes to running a command like
cd /D R:/some_path…`
it gives the following error message
sh: line 0: cd: /D: No such file or directory
but directly running the same command via Windows 10 cmd is successful. What's odd to me here is that this error message is used to appear on Linux systems. what could be causing this behaviour, and how can I get it to work correctly?
thanks for all the comments. I figured out that the Perl I'm using is inside the cygwin/bin folder. I changed it to regular perl under windows and it works great.
I have a unix command
(script) which has a nested perl script in it.
when i run this unix command from command line it works fine.
If I am running same command from a tcl file using exec, i am getting following error:
'sh: /cmdpath/cmd.pl: /usr/local/bin/perl5: bad interpreter: Permission denied'
Any Idea what could be causing this. My tcl code is trying to execute this command several times ( more than 100 times).
Thanks
Ruchi
Almost certainly your Perl script is encoded in DOS/Windows line-ending format, which uses \r\n to terminate lines. Since Unix terminates lines with \n only, the \r is interpreted as belonging to the executable name, so that the kernel tries to run a program named perl5\r and fails.
Deleting the trailing \r on this line should fix the problem.
Alternatively, it may be that the perl5 executable either does not exist at the given path, or exists but lacks the execute permission bit. If you have this executable living somewhere else in the filesystem, update the path on the first line of the script to point to it. To fix the latter problem, run
chmod +x /usr/local/bin/perl5
You will need to be root to do this.
Given the output you are showing, you are likely executing "sh cmd.pl". In turn, sh is trying to execute the perl interpreter.
Why not spawn "/usr/local/bin/perl5 cmd.pl" directly, this will be more efficient, especially if you are doing that hundreds of time.
I am using Perl in Eclipse.
In the same directory, I have a .pl file and two .pm files (pmFile1.pm, pmFile2.pm).
At the top of the .pl file, I use the command:
use pmFile1;
use pmFile2;
I get an error
Compilation failed in require
I do not believe I had this error earlier. I have researched this error online, and cannot figure out what may have caused it, because I have not found a similar situation to mine that caused the error. I do not know what other information would be pertinent to include, but will add anything if asked...
Thank you.
I suggest you check the module pmFile1.pm for errors in a terminal shell
$ perl -c pmFile1.pm
syntax error at pmFile1.pm line 1, near "."
pmFile1.pm had compilation errors.
When entering a single dot . as a syntax error into pmFile1.pm and running the p.pl file then the errors below are shown in Eclipse, the same as you described. If you run the .pl file in a terminal shell then you get the same compilation failed in require as in eclipse:
$ perl p.pl
syntax error at pmFile1.pm line 1, near "."
Compilation failed in require at p.pl line 1.
BEGIN failed--compilation aborted at p.pl line 1.
This may not be your problem, but I've been "bitten" by something similar before: check the End of Line chars in the file. It may be that your code is seen by the compiler to be all one line, making an error anywhere in the code appear as being on line 1 when visually (in the editor) the offending line would be later in the code. In notepad++ you resolve this sort of issue by using the Edit > EOL Conversion > Windows Format (or whatever format is correct for you) menu option, though other editors will likely have a similar feature for *NIX <-> Windows EOL conversions. This error would make sense if you can successfully use the module files giving you an error without errors in other script files.
I solved this by changing the required package to some dummy name, then retaining it.
I found this piece of code in perl
system("zip $ZIP_DEBUG -r -9 itvlib.zip $include $exclude");
However I don't understand how it is working. I mean system() is used to fire 'system' commands right ? So is this 'zip' command used here a 'system' command ?
But I tried firing just the following on the command prompt;
zip $ZIP_DEBUG -r -9 itvlib.zip arg1 arg2
It didn't work !
it gave the following error:
'zip' is not recognized as an internal or external command,
operable program or batch file.
Well this shouldn't have happened, since the command seems to use 'zip' as a system command. So this makes the command 'zip' mysterious
Can you please help me to understand this command with all its parameters?
It's probably not working since you're not replacing things like $ZIP_DEBUG with their equivalent real values. Within Perl, they will be replaced with the values of the variables before being passed to the system call.
If you print out those Perl variables (or even the entire command) before you execute that system call, you'll find out those real values that you need to use. You can use the following transcript to guide you:
$ perl -e '
> $ZIP_DEBUG = "xyzzy";
> $include = "inc_files";
> $exclude = "exc_files";
> print "zip $ZIP_DEBUG -r -9 itvlib.zip $include $exclude";
> '
zip xyzzy -r -9 itvlib.zip inc_files exc_files
For details on how system works, see here. For details on what zip needs to function, you should just be able to run:
man zip
from a command line shell (assuming you're on Linux or its brethren). If, instead, you're on a different operating system (like Windows), you'll have to figure out how to get the zip options out. This may well be as simple as zip -? of zip -h but there's no guarantee that will work.
If it's the same as the Info-ZIP zip under Linux (and it may be if you have the -9 and -r options and your exclude variable starts with -x), then zip -h will get you basic help and zip -h2 will give you a lot more.
system("zip $ZIP_DEBUG -r -9 itvlib.zip $include $exclude");
is running a program named zip (probably zip.exe) somewhere on the path. $ZIP_DEBUG, $include, and $exclude are Perl variables that are interpolated into the command line before the command is run.
If the system call works in the Perl script, but zip -? gives the 'zip' is not recognized as an internal or external command, operable program or batch file error, then the PATH of the Perl script must be different than the PATH in your command prompt. Or, there might be a zip command in the current directory when Perl executes the system command. (In Windows, the current directory is an implicit member of your PATH.)
To see what the PATH is for the Perl script, you can add a print "$ENV{PATH}\n"; before the system command. To see what the PATH is in your command prompt, type PATH.
Yes, zip is a system command. The variables $ZIP_DEBUG and such are perl variables that are interpolated to the command before launching zip.
To debug what the actual call is, try adding:
print("zip $ZIP_DEBUG -r -9 itvlib.zip $include $exclude\n");
See perldoc for details on system.