August 2020 - Page 27 of 69

How to Authenticate Users to a SSH Server Using Monkeysphere on an Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

How to Authenticate Users to a SSH Server Using Monkeysphere on an Ubuntu VPS

  • August 20, 2020
  • Linux
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The authorized_keys file on an SSH server can become difficult to manage with key changes and a large amount of entries. It can be hard to know which credentials are valid and which actual person each key is associated with. The Monkeysphere system allows you to configure authentication to an SSH server in plain English by utilizing GPG keys. This leads to a more manageable system and allows you to create policies for users, not keys.

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How to Use for Loops in Python 3 – Complete Guide 2025–2026

How to Use for Loops in Python 3 – Complete Guide 2025–2026

Learning how to use for loops in Python 3 is one of the most essential and frequently used skills at Progressive Robot — for loops let you iterate over sequences (lists, tuples, strings, dictionaries, ranges, files, etc.) in a clean, readable, and efficient way, making them perfect for processing data, generating reports, building automation scripts, training models, rendering UI elements, handling API responses, and almost every repetitive task in modern Python development.

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Common Problems 121122

Debian 10 – root filesystem fills rapidly from logs and cache growth

  • August 19, 2020
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Debian 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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openSUSE Tumbleweed — kismet — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — kismet — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • August 19, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2019:2392-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-17666 CVE-2020-9395 Upstream summary: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel through 5.3.6 lacks a certain upper-bound check, leading to a buffer overflow. Table of […]

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Common Problems 117450

Ubuntu 20.04 LTS Root Partition Reaches 100 Percent

  • August 19, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Ubuntu 18.04 — fwupd — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — fwupd — vulnerability — patch and remediation guide

  • August 19, 2020
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4395-1 Related CVEs: CVE-2020-10759 Upstream summary: Justin Steven discovered that fwupd incorrectly handled certain signature verification. An attacker could possibly use this issue to install an unsigned firmware. Table of […]

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Common Problems 115959

Ubuntu 26.04 LTS – UFW rules block Docker container egress unexpectedly

  • August 19, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention […]

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Common Problems 115563

RHEL 7 – service Command Fails Because SysV Script Lacks Execute Bit

  • August 19, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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