Linux指令篇:字串处理--tr

名称：tr

### 1.比方说要把目录下所有的大写档名换为小写档名?

似乎有很多方式，"tr"是其中一种:

#!/bin/sh

dir="/tmp/testdir";

files=`find $dir -type f`;

for i in $files

do

dir_name=`dirname $i`;

ori_filename=`basename $i`

new_filename=`echo $ori_filename | tr [:upper:] [:lower:]` > /dev/null;

#echo $new_filename;

mv $dir_name/$ori_filename $dir_name/$new_filename

done

### 2.自己试验中...lowercase to uppercase

tr abcdef...[del] ABCDE...[del]

tr a-z A-Z

tr '[:lower:]' '[:upper:]'

shell>> echo "this is a test" | tr a-z A-Z > www

shell>> cat www

THIS IS A TEST

### 3.去掉不想要的字串

shell>> tr -d this ### 去掉有关 t.e.s.t

this

man

man

test

e

### 4.取代字串

shell>> tr -s "this" "TEST"

this

TEST

th

TE