How hackers find hidden passwords on a linux machine
A text editor. A Python script. A backup config file. None of these sound dangerous. But on a misconfigured Linux machine, any one of them can hand a hacker full root access not through exploitation, but through permissions that were set wrong and never fixed.
In this video you'll learn:
~ How to find writable directories you should not be able to write to — and why a directory owned by root that you can write to is an instant privilege escalation path if any root cron job runs a script stored there
~ What the SUID bit actually is — explained plainly as a "run as owner" stamp, and why finding it on unexpected tools like vim, python3, or find means you can execute anything as root right now
~ How to use grep -ri password /etc to recursively search every config file on the machine for hardcoded credentials, API keys, and SSH private keys that developers stored and forgot about
~ The full find command workflow for locating SUID files — what the output looks like, which results are normal, and which ones are the red flags worth investigating
~ Why backup files are worth hunting — files ending in .bak often contain old credentials or configuration details that were removed from production but never deleted from disk
This is Part X of our Linux Privilege Escalation series — the last major enumeration topic before we move into active exploitation techniques. After this video you have the complete manual enumeration picture: users, kernel, processes, environment, services, cron, network, ports, software versions, and now file permissions.
If you've searched for SUID privilege escalation explained, find SUID files linux hacking, grep password linux config files, writable directory privilege escalation, or linux file enumeration kali linux this is that video.
We run real commands live, walk through real output, and show exactly which results are dangerous. Ethical hacking tutorial for complete beginners.
If this helped you, subscribe ~ I post new hacking tutorials every week.
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Links:
• Linux Manual Enumaration for PrivEsc
• Gathering information about Network
• Advanced Linux Privileges Escalation Course
• Advanced Windows Privileges Escalation COURSE
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Chapters:
00:00 — What System File Enumeration Is — The Three Things We Are Looking For
00:46 — Finding Writable Directories You Should Not Own
01:04 — The find Command — Walking the Entire Filesystem for Writable Paths
02:08 — Why a Writable Root Directory Is an Instant Cron Job Hijack
02:33 — The PATH Hijack Script — Flagging Dangerous Writable Directories
04:12 — What a SUID File Is — The "Run As Root" Stamp Explained
04:45 — The Most Surprising Path to Root in Linux
05:16 — Running the find Command for SUID Files — Reading the Output
05:57 — Normal SUID Files vs Red Flag SUID Files
06:01 — grep for Passwords — Searching Every Config File in /etc
07:15 — What We Are Actually Looking For — Passwords, API Keys, SSH Keys
07:41 — Hunting SSH Private Keys — What the Header Looks Like
08:06 — Backup Files — Why .bak Files Are Worth Every Second of the Search
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TOPICS COVERED
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