Linux - Save only recent 10 folders and delete the rest

Question

I have a folder that contains versions of my application, each time I upload a new version a new sub-folder is created for it, the sub-folder name is the current timestamp, here

Answer 1

ls -lt | grep ^d | sed -e '1,10d' |  awk '{sub(/.* /, ""); print }' | xargs rm -rf 

Explanation:

• list all contents of current directory in chronological order (most recent files first)
• filter out all the directories
• ignore the 10 first lines / directories

• use awk to extract the file names from the remaining 'ls -l' output

• remove the files