testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
Sub is a model for setting up shell programs that use subcommands, like git or rbenv using bash. Making a sub does not require you to write shell scripts in bash, you can write subcommands in any scripting language you prefer.
Restore Backup of hard disk copy, MBR Backup & Restore
.bash_profile, .profile, & .bashrc Conventions
or did you know ~<tab><tab> - All Present Users on system from "/etc/passwd"
These commands can tell you what key bindings you have in your bash shell by default.