The syntax (1..254) is incorrect in Bash, as it uses brace expansion or seq for looping. The correct syntax should be:
for i in $(seq 1 254)
Also, the missing do is an issue, but the syntax error mentioned points specifically to the loop structure.
Fixing the sequence format resolves it.
Corrected script:
#!/bin/bash
for i in $(seq 1 254); do
ping -c1 192.168.1.$i
done
From the CompTIA PenTest+ PT0-003 Official Study Guide (Chapter 4 - Scanning & Enumeration):
"Bash scripting is commonly used for automation in enumeration. The ' seq ' command generates a sequence of numbers for iteration in loops." Reference: CompTIA PenTest+ PT0-003 Official Study Guide, Chapter 4
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