Shell grooming (27) = = = Uppercase and lowercase letters replace modified file names

(a) Title:

(1) Create a folder

(2) There are 10 files in the folder that begin with any letter or number

(3) If the first digit in the beginning does not change

(4) If the first letter at the beginning is changed to uppercase

For example, the modified result

[[email protected] hushuai]# ls

06e28fe4 5b1775ab 74D1BADF cccb27b2 F3619201

3bfaa07c 6bd6b971 C4a1f7d8 db3308c4 F6403885

[Email protected] hushuai]#

The shell code is as follows:

#!/bin/bash

A= ' ls hushuai/|xargs-n1 '

echo "$a" |while read Line # This place must be enclosed in double quotes, details, without parsing spaces

Do

B= ' echo $line | Cut-c1 '

C= ' echo $line |cut-c2-'

D= ' echo $b |grep-c ' [A-z] ' # must be added [], not the same as TR

If [$d-eq 1];then

E= ' echo $b | Tr ' A-Z ' A-Z '

MV hushuai/$b $c hushuai/$e $c 2>/dev/null

Fi # MV old name New name

Done

This kind of writing seems disorganized, complicated, we can change the judgment into a function, the result of the modification is as follows:

#!/bin/bash

Swap () {b= ' echo $line | cut-c1 '

C= ' echo $line |cut-c2-'

D= ' echo $b |grep-c ' [A-z] '

}

A= ' ls hushuai/|xargs-n1 '

echo "$a" |while read line

Do

Swap

If [$d-eq 1];then

E= ' echo $b | Tr ' A-Z ' A-Z '

MV hushuai/$b $c hushuai/$e $c 2>/dev/null

Fi # If you say you executed multiple scripts, the first name has been changed.

Done will give an error, we let the errors output to null

And then we'll do an upgrade on the subject.

(1) Create a folder

(2) The folder contains 10 arbitrary 6-10-bit random numbers starting with Dingxue

(3) Replace Dingxue's first letter ding with any uppercase letter

(4) Replace the trailing 6-10-bit random numbers with equal-length lowercase letters

For example:

[[email protected] hushuai]# ls ding/

dingxue87495987 dingxue885527619 dingxue894674790 dingxue908168

dingxue87819699 dingxue8884654 dingxue8974959

dingxue8810688 dingxue89173327 dingxue903851012

The shell code is as follows:

#!/bin/bash

#for i in ' seq 10 '

#do

# b=$ ((random%4+6)) # random number Application

# a= ' Date +%n '

# c= ' echo $a | cut-c1-$b '

# Touch Dingxue$c

#done

A= ' ls ding/|xargs-n1 '

echo {A.. Z} |xargs-n1>file

D= ' Cat file | Wc-l '

echo "$a" |while read line

Do

e=$ ((random% $d + 1))

W= ' echo $line |awk-f ' [0-9] ' {print '} '

B= ' echo $line | Cut-c 1 '

f= ' Cat file | Sed-n ' $e ' P '

G= ' echo $w |sed ' s/' $b '/' $f '/' #sed, awk reference variable all add single quotes

#echo $g Specific circumstances

H= ' echo $line | Awk-f ' [A-z] ' {print $8} '

I= ' echo $h |tr ' $h ' A-Z ' # here too, be sure to pay attention to my quotes

Echo $g $i

Done

This is what I just started to write, is not looking very messy, we can change the judgment part into a function, the result of the modification is as follows:

Shell code:

#!/bin/bash

Prepare () {

A= ' ls ding/|xargs-n1 '

echo {A.. Z} |xargs-n1>file

D= ' Cat file | Wc-l '

}

Random () {

e=$ ((random% $d + 1))

}

Virable () {

W= ' echo $line |awk-f ' [0-9] ' {print '} '

B= ' echo $line | Cut-c 1 '

f= ' Cat file | Sed-n ' $e ' P '

G= ' echo $w |sed ' s/' $b '/' $f '/'

H= ' echo $line | Awk-f ' [A-z] ' {print $8} '

I= ' echo $h |tr ' $h ' A-Z '

}

Prepare

echo "$a" |while read line

Do

Random

Virable

Echo $g $i

Done

Isn't that a lot clearer?

This article from "It Life" blog, declined reprint!

Shell grooming (27) = = = Uppercase and lowercase letters replace modified file names