As usual, we can RTFM. Bash command line editing refers to Readline library
Command line editing is provided by the Readline library, which is used by several different programs, including Bash.
and has a section on searching. Readline library command line editing also covers searching.
Before trying ctrl-s, you may want to disable software flow control: run stty -ixon
& add it to your initialization files.
Otherwise, you’ll pause terminal output.
ctrl-q resumes terminal output.
Cool way to break your computer wide open to security exploits.
Also, an awesome image of text, so people can’t just copy & paste it, but that’s more of a hidden blessing.