The missing do keyword is the reason for the syntax error. Bash for loops must include a do statement before executing commands within the loop.
Corrected script:
#!/bin/bash
for i in {1..254}; do
ping -c1 192.168.1.$i
done
From the CompTIA PenTest+ PT0-003 Official Study Guide (Chapter 4 - Scanning and Enumeration):
"In Bash scripting, control structures like for-loops require correct syntax, including the 'do' keyword for loop logic to execute properly." Reference: Chapter 4, CompTIA PenTest+ PT0-003 Official Study Guide