Using mmv and GNU parallel to easily rename bunches of files under mulitple dirs

renaming_stuff.sh

# My situation: I have a bunch of experiments nested under parameter dirs
# 10/ 20/ 30/ ...
# Each experiment dir has some experiment files, trailing _X indicates X repeat of experiment
# specific dataset
# ls 10/
# dataset1_0.csv dataset2_0.csv dataset1_1.csv dataset2_1.csv
# Problem: I want to rename all the <datasetname>_1.csv files to <datasetname>_2.csv
# Solution: parallel & mmv!
# Use GNU parallel because it has a nicer syntax than bash for loops
parallel -j -q 2 mmv {1}/"*_1.csv" {1}/"#1_2.csv" ::: {10..100..10}