BusyBox combines tiny versions of many common UNIX utilities into a single small executable.
This may help you when you got your shell broken since busybox in independent binary which includes a lot of commands inside.
In simple words this tool can save your life 🙂
Find the latest version of busybox at https://busybox.net/downloads/binaries
Then install it as the following:
wget -O /usr/bin/busybox https://busybox.net/downloads/binaries/1.35.0-x86_64-linux-musl/busybox chmod +x /usr/bin/busybox
Use the following command to see all inbuilt commands:
busybox ln -s /lib/libc-2.12.so /lib/libc.so.6
busybox mv folder folder_old