如何在单个文本文件中保存目录中所有文件的列表并添加前缀和后缀？

Question

I am trying to save a list of files in a directory into a single file using

ls > output.txt

Let's say we have in the directory:

a.txt
b.txt
c.txt

I want to modify the names of these files in the output.txt to be like:

1a.txt$
1b.txt$
1c.txt$

Answer 1

Another easy way use AWK to change content and save to file via.tmp

This script will print content how you want. Just add "1" and "$" to begining and ending accordingly.

cat output.txt  | awk '{print "1"$1"$"}'

And then you can save to original file as you want by extending command && (if success then next )

cat output.txt  | awk '{print "1"$1"$"}' > output.txt.tmp && mv output.txt.tmp output.txt

Answer 2

#!/bin/sh -x
for f in *.txt
do
nf=$(echo "${f}" | sed 's@^@1@')
mv -v "${f}" "${nf}"
done