Crypto futures are contracts to buy or sell an asset at a predetermined price on a specific expiry date. They function similarly to traditional financial futures but operate within crypto markets. Key characteristics: Expiry dates: Set end dates, typically weekly, quarterly, or annual contracts Price convergence: As expiry approaches, the futures price converges with the…
This kernel change (commit 87d855e) prevents the Graphics Micro-Controller (GuC) and HEVC Video Codec (HuC) from being enabled by default on Intel GPU generations before Gen11, even when using automatic detection mode. Background: GuC and HuC in i915 The i915 driver supports hardware-based GPU command submission and video codec acceleration through GuC and HuC firmware….
GCC applies sophisticated optimizations to recursive functions, and recursive inlining is one of the most dramatic. When the compiler can’t use simple tail-call optimization—because a function has side effects like printf that reference stack parameters—it often unrolls multiple recursion iterations into a single function body. Understanding this behavior matters for performance tuning, debugging, and predicting…
Sparse files optimize storage by storing only metadata for contiguous zero-filled ranges instead of allocating actual disk blocks. They’re essential for VM images, virtual block devices, and large databases where much of the allocated space remains unused. Most modern filesystems support sparse files: ext4, btrfs, and XFS on Linux; NTFS on Windows; and APFS on…
Storage Limitations BIOS uses MBR (Master Boot Record) partitioning, which maxes out at 2.2TB addressable space due to 32-bit LBA limitations. UEFI uses GPT (GUID Partition Table), supporting drives up to 9.4 zettabytes theoretically—practically unlimited for current hardware. If you’re deploying systems with large storage arrays or NVMe drives, UEFI is mandatory. Boot Process UEFI…
When running virtual machines with QEMU/KVM, you’ll frequently need to transfer files or share directories between the host and guest systems. Several methods work well depending on your use case and performance requirements. 9p (Virtio) Filesystem The 9p protocol is the most straightforward approach for sharing directories. It’s lightweight and doesn’t require additional guest agents….
Date comparison is one of the most common operations in SQL queries, whether you’re filtering orders, analyzing logs, or generating reports. The approach varies slightly across database systems, but the underlying principles remain consistent. Basic Date Comparison The simplest form uses standard comparison operators against a date string in YYYY-MM-DD format: SELECT * FROM orders…
Zimbra’s web interface needs proper hostname and port configuration to function correctly, especially when you’re deploying behind load balancers, reverse proxies, or in clustered environments. Viewing Current Configuration Check your current Zimbra web service hostname and port settings: zmprov getServer $(zmhostname) zimbraMailPort zmprov getServer $(zmhostname) zimbraMailSSLPort zmprov getServer $(zmhostname) zimbraAdminPort You can also query the…
Firefox Sync requires an email address and a password to function. The critical question: if someone gains access to your Firefox account or device, can they read your synced passwords without knowing your master password? The short answer: no. Only you with your password can decrypt your synced data. Mozilla’s servers cannot access your encrypted…
When a hard drive fails physically, data recovery becomes challenging but sometimes possible. If the drive isn’t recognized by the system or showing signs of mechanical failure, professional recovery services may be necessary—but they’re expensive. Before going that route, you can attempt recovery yourself using open-source tools. When to attempt DIY recovery You can safely…
Rocky Linux 9 can blank the console screen after a period of inactivity, but by default it may not actually power off the display. This is often caused by kernel mode settings or DPMS (Display Power Management Signaling) configuration. Check Current DPMS Status First, verify whether DPMS is enabled on your console: cat /sys/module/kernel/parameters/consoleblank If…
RPM Fusion provides packages that Fedora and RHEL can’t ship by default due to patent, licensing, or trademark restrictions. This includes multimedia codecs, proprietary drivers, and other software. Here’s how to enable it on RHEL 9 and Rocky Linux. Enable RPM Fusion Free and Non-Free # Enable EPEL first (required dependency) sudo dnf install epel-release…
When your host machine connects to the network via WiFi, giving QEMU guests network access requires a different approach than traditional bridged networking. Since wireless interfaces typically don’t support bridge mode, you’ll need to use NAT (Network Address Translation) or a tap device with masquerading. Understanding your options NAT mode is the simplest approach—the host…
Legacy non-Unicode applications often display garbled text when run on Windows systems with mismatched language settings. A program compiled for Chinese text encoding will show corruption on an English Windows installation. This guide covers practical solutions for 2026. Modern Approach: Using Windows Locale Emulation The most reliable method is to run the application with a…
To mark text as deleted or struck through in BBCode, use the [s] tag: [s]strikethrough text[/s] This renders as strikethrough text with a horizontal line through the middle. Some platforms also support the longer [strike] alias: [strike]strikethrough text[/strike] Both tags are functionally equivalent — the choice depends on your platform’s BBCode parser. HTML Output and…
To toggle between Simplified Chinese and Traditional Chinese input modes in ibus-libpinyin, press Ctrl+Shift+F. This shortcut has been the standard method since ibus-pinyin 1.3.7 and works across modern versions. Common ibus-libpinyin Shortcuts Beyond script conversion, these shortcuts handle daily input tasks: Shortcut Function Ctrl+Shift+F Toggle Simplified/Traditional Chinese Ctrl+. Toggle full-width/half-width punctuation Ctrl+, Toggle English/Chinese punctuation…
If you’re working with legacy BIOS systems and MBR partition tables, Fedora’s installer can sometimes misdetect your firmware mode and attempt UEFI/GPT setup on hardware that only supports legacy BIOS. This guide covers the proper approach for Fedora 39+ on MBR systems. Prerequisites Before starting, verify your system configuration: Boot the installer in legacy BIOS…
Fedora upgrades are straightforward with dnf system-upgrade, the standard tool for network-based distribution upgrades. This replaces the older fedup tool and handles everything from downloading packages to managing the upgrade environment. Pre-Upgrade Checklist Before starting any upgrade: Update your current system: sudo dnf upgrade Back up critical data — especially /etc, home directories, and application…
When you start a VNC server with the -geometry flag under GNOME 3, you’ll notice the display resolution doesn’t match what you specified: vncserver -geometry 1024×768 This works fine with GNOME 2 and window managers like twm, but GNOME 3 ignores the setting. The actual resolution will be whatever was last used in that session,…
SSH is essential for serious shared hosting management — it beats FTP by a mile and gives you real shell access for development, deployment, and automation. Most reputable shared hosting providers support SSH, though availability and implementation vary. Major Providers with SSH Support DreamHost DreamHost has long supported SSH on shared hosting. You’ll need to…