Question

in bash, with

$ echo {1..10}
1 2 3 4 5 6 7 8 9 10

I can get a numbers sequence, but in some case I need

01 02 03 ... 10

how I can get this ?

and how I can get ?

001 002 ... 010 011 .. 100

Answer 1

This will work in any shell on a machine that has coreutils installed (thanks commenters for correcting me):

seq -w 1 10

and

seq -w 1 100

Explanation:

• the option -w will:

Equalize the widths of all numbers by padding with zeros as necessary.

• seq [-w] [-f format] [-s string] [-t string] [first [incr]] last

prints a sequence of numbers, one per line (default), from
first (default 1), to near last as possible, in increments of incr (default
1). When first is larger than last the default incr is -1