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The Problem

When connecting to a WireGuard VPN using NetworkManager on RHEL/CentOS systems, the connection succeeds but there is zero internet or network connectivity (pings fail). Meanwhile, OpenVPN works perfectly fine.

The Cause

Unlike OpenVPN, which adds standard routes to your main routing table, NetworkManager's WireGuard implementation uses Policy-Based Routing (PBR) and firewall marks (fwmark) to route traffic through a hidden routing table (usually table 51963).

RHEL and CentOS enforce Strict Reverse Path Filtering (rp_filter=1) by default for security. The kernel's anti-spoofing mechanism sees incoming return packets on your physical interface, checks the main routing table, gets confused by the fwmark setup, and drops the packets.

The Solution

You need to tell the kernel's Reverse Path Filter to take routing marks into account by enabling src_valid_mark.

webgtx

gsettings set org.gnome.GWeather4 temperature-unit centigrade

webgtx

If you want the physical Control key to become Caps Lock, run this:

gsettings set org.gnome.desktop.input-sources xkb-options "['ctrl:swapcaps']"

To undo changes, run this:

gsettings reset org.gnome.desktop.input-sources xkb-options

webgtx

Add this flatpak environment variable globally

XCURSOR_PATH=/run/host/user-share/icons:/run/host/share/icons

You can do it with a Flatseal if you prefer GUI.

Alternatively, you can copy paste this command to do the job.

flatpak --user override --env "XCURSOR_PATH=/run/host/user-share/icons:/run/host/share/icons"

webgtx

! Restore Ctrl+Shift+(c|v)
URxvt.keysym.Shift-Control-V: eval:paste_clipboard
URxvt.keysym.Shift-Control-C: eval:selection_to_clipboard
URxvt.iso14755: false
URxvt.iso14755_52: false

! Appearance
URxvt.font: xft:Monospace:size=12
URxvt.background: black
URxvt.foreground: white

webgtx

1. First, visually select the area you want to search in.
2. Enter the normal mode.
3. Then hit / and type this in the search bar:

\%Vpattern

webgtx

The Issue

By default, when you call breakpoint() you enter PDB even if you have installed ipdb in your virtual environemnt.

Solution

Just export this environment variable

export PYTHONBREAKPOINT=ipdb.set_trace

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#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>

typedef struct node {
    char ch;
    struct node* next;
} node;

node* type(node* next);

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@media (prefers-color-scheme: dark) {
	body {
		background: #202020;
		color: silver;
	}
	
	a {
		color: white;
	}
	

webgtx

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#define BUFFER_SIZE 512

int main(void)
{
    char* string = malloc(sizeof(char) * BUFFER_SIZE);
    if (!string) return 1;