identify missing files in a folder

Question

I have a process creating the following files, which share a similar pattern.

file_1.txt
file_2.txt
.
.
.
file_1000.txt
.
.
.
file_1901.txt
file_1902.txt

But, there are only 1890 files in the folder. I would like to know if there is a way to identify the missing files from the list of files sharing a pattern.

Kamaraj · Accepted Answer · 2017-04-10T07:35:41.273

2

#!/bin/bash

for i in {1..2000}
do
    file_name="file_${i}.txt"
    if [ ! -f ${file_name} ]
    then
        echo "${file_name} not exists.."
    fi
done

for i in {1..2000};do file_name="file_${i}.txt"; [ -f ${file_name} ] || echo "${file_name} not exists"; done

edited Apr 10 '17 at 07:35

answered Apr 07 '17 at 08:20

Kamaraj

4,365

Thanks for the working solution. Any one-liners possible? – Prradep Apr 07 '17 at 09:35
1

added one-liner – Kamaraj Apr 10 '17 at 07:35

identify missing files in a folder

1 Answers1