Question 1

What does bash do?

Accepted Answer

GNU Bourne-Again shell The default shell on most Linux systems. `bash -c` runs a string as a command; `bash script.sh` runs a script.

Question 2

Is bash dangerous?

Accepted Answer

MEDIUM risk. Runs arbitrary commands; scripts execute with your privileges. `curl … | bash` executes unseen remote code — download, read, then run. Without `set -euo pipefail`, scripts continue after errors and can do damage with empty variables.

Flag	Meaning
`-c`	Run a command string
`-x`	Trace commands as they run
`-n`	Syntax check without running
`-e`	Exit on first error
`-u`	Treat unset variables as errors
`-l`	Login shell