Watching memory rise in GNOME System Monitor while deciding whether to open another app can make the available amount hard to judge. I’m intrigued that cache can count as used without being out of reach for new work. Linux’s free counter captures pages unused at that moment, not every page it can hand to an
5 Ways To Check Available Memory In Linux Read More »
`fatal error: stdio.h: No such file or directory` is a frustrating result when `gcc` itself answers in the terminal. I couldn’t resist finding out how an installed compiler can still be short of what a simple C program needs. The payoff is a C program that compiles and runs instead of stopping at the include
Installing the GCC Compiler on Ubuntu/Debian Read More »
Why does the DNS reply list the resolver as Source when the query listed it as Destination? I couldn’t resist digging into how those fields mark the answer’s return trip. Wireshark turns that question into something you can inspect on Ubuntu or Debian. Get it running and start a capture while a DNS lookup takes
How to Install Wireshark On Ubuntu/Debian and Capture Packets Read More »
`ls -lh` can leave `backup.img` halfway down the screen because the names set the order. I’m curious to see how that same directory reads when size calls the shots. A size-ranked listing points you to an entry to inspect without turning the directory into one disk-usage total. GNU `ls -S` starts by ordering the entries
How to Sort Files By Size in Linux? [Command Line] Read More »
You have `~/.bashrc` open beside `~/.profile`, and neither filename tells you which one shaped the terminal you just started. I couldn’t resist digging into how Bash chooses between them, because the answer depends on the kind of shell it opened. Getting that choice right helps explain why an alias appears in one terminal but a
Understanding Linux bash profile and bashrc files Read More »
A fresh Ubuntu Server boot can leave you at a login prompt with no desktop to open. I’m curious how that shell-only machine becomes a familiar Ubuntu session without confusing an installed desktop with a visible one. You’ll get a GNOME session you can reach through the machine’s display, not just a new prompt in
How to Install GNOME on Ubuntu? Read More »
On Kali, searching for “Tor Browser” can bring up package instructions while the download page offers a different-looking starting point. I’m eager to understand the browser’s role before that choice turns into a stalled setup. The goal is to move past the choice and reach Tor Browser’s first connection screen. Tor Browser sends its own
Tor Browser on Linux: How to Install and Set Up? Read More »
`records.txt` contains `17:Ada:engineer`, but `cut -c 2-4` takes character positions instead of returning the `Ada` field. I love that one compact command can give you a focused view of the row without changing the file. That output can be passed along while the original record stays intact. `cut` makes its selection line by line, which
The cut Command in Linux – A Complete Usage Guide Read More »
With `sleep 30` running in the foreground, Ctrl+C can cut the wait short. I’m fascinated that a keypress can interrupt a running command without changing the rest of the computer’s power state. That matters when choosing between a timer and waiting for a child process to end. The command’s scope starts with the process `sleep`
How to use the sleep command in Linux to pause scripts Read More »
The QEMU/KVM connection is missing from virt-manager, and the button for creating a local guest has nowhere to go. I was surprised that the window for managing VMs is separate from the software that runs them. Knowing what each part does gives that empty connection list a useful explanation. You can then see how virt-manager
Using virt-manager to manage virtual machines in Linux Read More »