How the shell generates a sequence 01 02 03 04 05

Seq Command Introduction

Use:

Seq-print a sequence of numbers

Grammar:

seq [OPTION] ... Last

seq [OPTION] ... First Last

seq [OPTION] ... First INCREMENT Last

Common options

-S,--separator=string

Use STRING to separate numbers (default: \ n)

-W,--equal-width

Equalize width by padding with leading zeroes

1 Default Printing 1-10

[[email protected] ~]# seq 1 512345

2 Printing 5-1

[[email protected] ~]# seq 5-1 154321

3 Printing 1 2 3 4 5

[[email protected] ~]# seq-s ' 1 51 2 3 4 5

Or

[[email protected] ~]# SEQ 1 5 | Tr ' \ n ' ' 1 2 3 4 5 [[email protected] ~]#

4 Printing 01 02 03 04 05 06 07 08 09 10

[[email protected] ~]# seq-s '-W 1 1001 02 03 04 05 06 07 08 09 10

Or

[[email protected] ~]# echo {01..10}01 02 03 04 05 06 07 08 09 10

Commonly used in a for loop

[[email protected] ~]# for i in {1..10};d o echo $i;d one12345678910[[email protected] ~]# for I in ' seq-w-S ' 1 10 '; Do echo $i;d one01020304050607080910

This article is from the "Tridewah operation and maintenance work Road" blog, please be sure to keep this source http://cuidehua.blog.51cto.com/5449828/1766440

How the shell generates a sequence 01 02 03 04 05