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This article introduces the knowledge of "how to write a Shell script to modify the suffix code in batches". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The code is as follows:

#! / bin/bash

Oldext= "JPG"

Newext= "jpg"

Dir=$ (eval pwd)

For file in $(ls $dir | grep. $oldext)

Do

Name=$ (ls $file | cut-d. -F1)

Mv $file ${name}. $newext

Done

Echo "change JPG= > jpg done!"

Here is a brief explanation for this program:

1. The variables oldext and newext specify the old and new extensions, respectively. Dir specifies the directory where the file is located

2. "ls $dir | grep. $oldext" is used to get all files with the old extension in the specified directory dir

3. In the loop, first use the cut command to put the file name in the "." The previous string is cut out and assigned to the name variable; the current file name is then renamed to the new file name.

Through this script, the extensions of all photos have been successfully modified. To make this script more generic, we can add a few read commands to enable interaction between the script and the user. The improved script is as follows:

The code is as follows:

#! / bin/bash

Read-p "old extension:" oldext

Read-p "new extension:" newext

Read-p "The directory:" dir

Cd $dir

For file in $(ls $dir | grep. $oldext)

Do

Name=$ (ls $file | cut-d. -F1)

Mv $file ${name}. $newext

Echo "$name.$oldext = = > $name.$newext"

Done

Echo "all files has been modified."

Attached: another version

The code is as follows:

#! / bin/sh

# file name: rename_suffix.sh

# author: zhouhh

# Email: ablozhou@gmail.com

# Date: 2008.4.1

Echo "input what suffix will be replaced:"

Read SUFFIX_SRC

Echo "input what suffix of file to rename to:"

Read SUFFIX_DST

For i in *. $SUFFIX_SRC

Do

If [- e $I]; then

Echo "mv $I to `basename $I. $SUFFIX_ SRC `.$ SUFFIX_DST"

Mv $I `basename $I. $SUFFIX_ SRC. $SUFFIX_DST

Else

Echo "file does not exist."

Exit-1

Fi

Done

This is the end of the content of "how to write a Shell script to modify the file suffix code in batches". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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