Generating consecutive numbered urls

Question

I want to generate a text file containing the folowing lines:

http://example.com/file1.pdf
http://example.com/file2.pdf
http://example.com/file3.pdf
.
.
http://example.com/file1000.pdf

Can any one advise how to do it using unix command line, please?

Thank you

What have you tried? Perhaps you can suggest some solution and tell us what specifically doesn't work. — pavelsaman, Dec 17 '20 at 14:27

score 1 · Accepted Answer · answered Dec 18 '20 at 10:18

1

With an interating for loop

for (( i=1;i<=1000;i++ ));
do 
    echo "http://example.com/file$i.pdf";
done > newfile

With seq:

while read i;
do 
   echo "http://example.com/file$i.pdf";
done <<< $(seq 1000) > newfile

answered Dec 18 '20 at 10:18

Raman Sailopal

12,320
2
11
18

Thank you all! On my Mac I use this: ```print -l 'http://example.com/file'{1..1000}.pdf > newfile``` On my Unix machine, I use this (by Raman Sailopal), this works on Mac as well: ```for (( i=1;i<=1000;i++ )); do echo "http://example.com/file$i.pdf"; done > newfile;``` – Majid Dec 26 '20 at 10:18
Great. If the suggestion meets your requirement, could you kindly up vote and accept the solution. – Raman Sailopal Dec 26 '20 at 10:36

score 0 · Answer 2 · answered Dec 17 '20 at 14:28

It is possible to create/run a python script file ato generate this. Using vim, nano, or any other terminal editor, create a python file as follows:

def genFile(fn, start, end):
  with open(fn, "w+") as f:
    f.writelines([f"http://example.com/file{str(i)}.pdf\n" for i in range(start, end+1)])

try:
  fn = input("File Path: ") # can be relative
  start = int(input("Start: ")) # inclusive
  end = int(input("End: ")) # inclusive
  genFile(fn, start, end)
except:
  print("Invalid Input")

Once this is written to a file, let's call it script.py. We can run the following command to execute the script:

python script.py

Then, fill out the prompts for the file path, start, and end. This should result in all those lines printed in the file specified delimited by '\n'.

Generating consecutive numbered urls

2 Answers2