strings command in Linux

strings command in is used to extract human-readable strings from binary files, such as executable files, object files, and libraries:

strings /lib/x86_64-linux-gnu/libpcre2-8.so.0

It is useful for finding out what's inside a binary file, especially when you don't have access to the source code.
We can use strings with anything that is, or can produce, a stream of bytes:

sudo strings /dev/mem | less