The test should check if the count of "FAIL" equals zero. The operator -eq is used for numeric equality in shell conditionals, so [ $(grep -c FAIL /var/file.log) -eq 0 ] correctly evaluates whether the count is zero.

The server is running and responding to pings, and DNS resolves correctly (dig server1 →
192.168.0.2). The ss -lnt output shows SSH (port 22) is listening, but the firewall (firewall-cmd -- list-all) does not list SSH among the allowed services. Therefore, external users cannot connect because the firewall is blocking SSH.

Using anonymized data ensures that no sensitive or proprietary information is exposed while still allowing the administrator to benefit from generative AI for tasks such as creating regular expressions.

This command iterates over each username stored in the variable and executes the account creation command for each entry, which is the correct and reliable way to create multiple user accounts from a list in a shell script.

Using ${num} ensures correct variable expansion, especially when variables are adjacent to other characters or hyphens. This prevents ambiguity and guarantees $num is properly expanded within the string.