SHELL

date linux format yyyymmdd

# put current date as yyyy-mm-dd in $date
date=$(date '+%Y-%m-%d')

# put current date as yyyy-mm-dd HH:MM:SS in $date
date=$(date '+%Y-%m-%d %H:%M:%S')

# print current date directly
echo $(date '+%Y-%m-%d')

linux get date yyyymmdd

date '+%Y/%m/%d' #Output 2022/03/11