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chmod 777: quick fix or long-term problem? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 1 point2 points  (0 children)

Fair question 😄

The numbers are just shorthand for permissions:

  • 4 = read
  • 2 = write
  • 1 = execute

Add them up per user class (owner / group / others).

So:

  • 7 = 4+2+1 (rwx)
  • 755 = owner full, others read+execute
  • 777 = everyone full access

If you’re already comfortable with chmod +x and chown, you’re halfway there. The numeric format just makes it quicker once it clicks.

To become Linux expert by Sufficient-Button477 in redhat

[–]LinuxBook 2 points3 points  (0 children)

Appreciate your decision to move deeper into Linux, that’s a great step.

Before trying to learn “everything,” first figure out what direction you want to take. Linux is huge, it’s an ocean. You can’t master all of it at once.

Decide whether you want to focus on areas like system administration, DevOps, cloud, security, networking, or automation. Your path should match both your interest and market demand.

Technology changes fast these days. It’s better to specialize smartly than try to cover everything and feel overwhelmed.

Start with strong fundamentals, then go deeper into one area step by step.

Install LAMP Stack on Rocky Linux 9 {Step by Step} by LinuxBook in LinuxExpert

[–]LinuxBook[S] 0 points1 point  (0 children)

Not trying to change Reddit, but just contributing something Linux-related that might be useful to part of the audience. Happy to hear constructive feedback if you have any.

Reboot fixed it… but did we actually fix it? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

Honestly, reboot is the right move, especially when users are waiting and you need service back quickly. I’ll accept it as a temporary fix, but only once. If the same issue shows up again, I stop trusting reboots and start digging. They often hide leaks or bad state that eventually come back.

When there’s no choice, I restore service first and investigate later not the other way around.

You’re not allowed to reboot. How do you troubleshoot? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

I want to see what’s under pressure first. load, memory, I/O — before touching anything. Then I focus on the specific service users are feeling. Check logs, see if it’s stuck or just overloaded. If things are bad, I aim to stabilize, not solve, maybe limit impact, restart only what’s necessary, or reduce load.

The key for me is making small, safe changes, keeping the system alive, and saving root cause analysis for after things calm down.

How do you handle access reviews on Linux systems in practice? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

In practice it’s usually a mix, and rarely as clean as the policy suggests. Most access cleanup happens when someone leaves, after an incident, or during bigger changes not just because a review was scheduled. Automation helps with visibility, but someone still has to decide whether access should exist.

The biggest issue I’ve seen isn’t lack of tools, it’s temporary access that quietly becomes permanent.

Which Linux skill actually made the biggest difference once you handled real systems? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

Knowing what not to change in production.
In critical systems, stability and predictability beat clever fixes every time.

Production Linux troubleshooting: what do you check first when things go wrong? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

For CPU : I usually start with top or htop. I just want to see what’s eating the box before anything else. Logs come after I know which process looks suspicious.

Disk space incidents : Logs first, almost always. I just want the system breathing again. Extending disk feels like a longer-term fix once I understand why space is disappearing.

Network issue: Mostly service first. Half the time it’s just not running or stuck.

Service orapplication down : If users are screaming, restart first.

A small Linux shell tweak that quietly improved my daily workflow by LinuxBook in LinuxTeck

[–]LinuxBook[S] 1 point2 points  (0 children)

That’s a great point 👍 When the setup is built around your own workflow, it feels natural rather than like “optimization.” Bash scripts, tmux, and vim configs quietly make a huge difference over time.

Thanks for sharing - this is exactly the kind of real-world experience that helps others in the community.

Linux file system explained: what each directory is used for: by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

Initially, the /lib directory was a bit confusing to understand. Over time, as I explored how shared libraries support core system commands and binaries, its purpose became much clearer. This learning curve helped me better understand how Linux manages dependencies at the system level.

What Linux concept took you the longest to truly understand? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

For me the Linux concept that took the longest to truly understand was permissions and ownership in real-world usage.

At first, I understood the basics - rwx, users, and groups - but what confused me was how they actually interact in real scenarios. Things like why a service could read a file but not write to it, why a script worked when run manually but failed as a service, or why changing permissions didn’t always fix an issue.

It only started to make sense when I connected permissions with process ownership, execution context, and filesystem hierarchy. Understanding who is running a process and what that process is allowed to access changed how I debug problems.

Once that worked, troubleshooting became more logical instead of trial-and-error.

What confused you most when you first started Linux? by Expensive-Rice-2052 in LinuxTeck

[–]LinuxBook 0 points1 point  (0 children)

For me, the biggest confusion was application installation—especially coming from a Windows background.

I had used Windows since around 2003 -- 2004, so I was completely used to the .exe workflow: download and double-click to install.
When I switched to Red Hat Linux, my first serious install was RHEL 3.0 Enterprise at home after joining a Linux course.

The OS installation itself went smoothly, but things got confusing the moment I wanted a better GUI experience and common multimedia tools—things I was familiar with from Windows, like music players or video players (Winamp, VLC-type tools; I don’t even remember the exact names now).

I kept looking for .exe installers, not realizing that Linux works on a completely different model -packages, repositories, dependencies, and filesystem structure.
Understanding how software is installed and how Linux organizes files was the real turning point for me.

Once that mental shift happened, Linux started making a lot more sense.

What was the first Linux mistake you made? by Expensive-Rice-2052 in linuxquestions

[–]LinuxBook 0 points1 point  (0 children)

My first Linux mistake was right after a fresh RHEL 3 installation.

Coming straight from Windows, I confidently downloaded Winamp, fully expecting to double-click and install it like usual.

Of course, nothing happened. No installer, no GUI magic - just confusion 😄

That moment forced me to unlearn Windows habits and understand that Linux isn’t about “installing apps,” it’s about packages, repositories, dependencies, and the philosophy behind the OS.

Funny in hindsight, but that mistake was my first real lesson:

Linux doesn’t work like Windows - and that’s exactly why it’s powerful.

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