Remove part of filename for multiple files using bash

Question

I have multiple files named 01 - a.txt, 02 - b.txt, 03 - c.txt etc. I want to remove the initial number and the dash to have all files named like a.txt, b.txt, c.txt. I'm not good with bash so I would be extremely thankful for some help.

Many thanks!

Answer 1

Try substring removal ##*-

E.g.

$ arr=("01 - a.txt" "02 - b.txt" "03 - c.txt")

$ echo "${arr[@]##*- }"
a.txt b.txt c.txt

In a loop

for i in *-*.txt;do echo "$i" "${i##*- }";done
01 - a.txt a.txt
02 - b.txt b.txt
03 - c.txt c.txt

Replace echo with mv if the output looks ok.