Linux installer script hotfix for determining os, verifies tar is installed, and fixes logic error in wget url testing.

[cr-huntress]

This commit fixes an issue with parsing the Linux OS type, adds a check if tar is installed, and fixes a logic error in how wget tests urls. These changes were successfully tested against CloudLinux 8.10 and Ubuntu 24.04.

Summary by CodeRabbit

• Bug Fixes

  • Fixed system information detection to accurately determine Linux distribution compatibility.
  • Improved installation requirements verification to ensure necessary tools are present before proceeding.

• Improvements

  • Expanded kernel version compatibility support for RHEL-compatible distributions.
  • Strengthened pre-installation validation checks.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated kernel requirement validation to accept version 4.18 for RHEL-compatible distributions by parsing /etc/os-release with quote stripping. Added tar installation check, adjusted wget error handling initialization, and improved os_release_id extraction logic.

Changes

Cohort / File(s)	Summary
Installation Script Updates Bash/linux/huntress-linux-install.sh	Updated kernel requirement check to treat 4.18 as valid for RHEL-compatible distros; added tar installation validation; improved os_release_id extraction with quote stripping; adjusted test_url wget exit code handling to initialize before invocation; updated requirement comment wording.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes all three main changes: OS determination fix, tar installation verification, and wget URL testing logic correction.

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✨ Finishing Touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/linux-418-fixes

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[coderabbitai]

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

Bash/linux/huntress-linux-install.sh (1)

165-176: ⚠️ Potential issue | 🟠 Major

RHEL-compatible distros list incomplete—inconsistent with terminology.

The allowed_418 array only checks for ID=rhel and ID=cloudlinux, but the function comment and error message state "RHEL-compatible distros"—a term conventionally encompassing Rocky, AlmaLinux, CentOS, and Oracle Linux. Systems on these distributions will incorrectly fail the kernel check even if they meet the 4.18+ requirement. Either clarify the comment/message to match the limited list, or expand the allowed ID check to include other RHEL-compatible distros and their corresponding ID_LIKE entries.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@Bash/linux/huntress-linux-install.sh` around lines 165 - 176, The kernel
check in version_check uses a narrow allowed_418 list that only contains "rhel"
and "cloudlinux" (allowed_418) and reads os_release_id from /etc/os-release,
which will cause Rocky/AlmaLinux/CentOS/Oracle to be treated as
non-RHEL-compatible; update version_check to either expand allowed_418 to
include "rocky almalinux centos oracle" and/or parse ID_LIKE (os_release_id and
os_release_id_like) so RHEL-compatible IDs are recognized, or alternatively
change the comment/error message to explicitly say only RHEL and CloudLinux are
supported; adjust the logic where allowed_418 is referenced and keep the
function name version_check and the os_release_id variable intact so callers
remain unchanged.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Outside diff comments:
In `@Bash/linux/huntress-linux-install.sh`:
- Around line 165-176: The kernel check in version_check uses a narrow
allowed_418 list that only contains "rhel" and "cloudlinux" (allowed_418) and
reads os_release_id from /etc/os-release, which will cause
Rocky/AlmaLinux/CentOS/Oracle to be treated as non-RHEL-compatible; update
version_check to either expand allowed_418 to include "rocky almalinux centos
oracle" and/or parse ID_LIKE (os_release_id and os_release_id_like) so
RHEL-compatible IDs are recognized, or alternatively change the comment/error
message to explicitly say only RHEL and CloudLinux are supported; adjust the
logic where allowed_418 is referenced and keep the function name version_check
and the os_release_id variable intact so callers remain unchanged.