Change Names of Multiple Files Linux

Question

I have a number of files with names a1.txt, b1.txt, c1,txt...on ubuntu machine.

Is there any quick way to change all file names to a2.txt, b2.txt, c2.txt...?

In particular, I'd like to replace part of the name string. For instance, every file name contains a string called "apple" and I want to replace "apple" with "pear" in all file names.

Any command or script?

Answer 1

without any extra software you can:

for FILE in *1.txt; do mv "$FILE" $(echo "$FILE" | sed 's/1/2/'); done

Answer 2

for f in {a..c}1.txt; do echo "$f" "${f/1/2}"; done

replace 'echo' with 'mv' if the output looks correct.

and I want to replace "apple" with "linux"

for f in *apple*; do mv "$f" "${f/apple/linux}"; done

The curly brackets in line 1 should work with bash at least.

Answer 3

The following command will rename the specified files by replacing the first occurrence of 1 in their name by 2:

rename 1 2 *1.txt