The most straightforward way to view a file’s content at a specific commit is with git show: git show REVISION:/path/to/file Replace REVISION with a commit hash, tag, branch name, or any valid Git ref. For example: git show abc1234:/etc/config.conf git show v1.2.0:/src/main.py git show HEAD~3:/README.md Save the file to disk To save a copy of…
Windows Disk Management has built-in limitations for resizing partitions — it often won’t let you extend the C: drive even when unallocated space exists on the disk. If you’ve hit that wall, third-party partition tools can handle the job more flexibly. Why Disk Management Falls Short Disk Management can only extend a volume into adjacent…
iOS 7.1.2 was released in 2014, and jailbreaking it today is neither practical nor recommended for active use. Why jailbreaking iOS 7.1.2 doesn’t make sense in 2026 Security vulnerabilities: iOS 7.1.2 reached end-of-life over a decade ago. It contains hundreds of unpatched security flaws that expose your device to malware, data theft, and network attacks….
When you need to completely wipe a USB drive on Windows, you have several reliable options. Choose based on your security requirements: Disk Management for quick reformatting, DiskPart for automation, or secure erasure tools if the drive contained sensitive data. Using Windows Disk Management The simplest built-in approach: Connect the USB drive Open Disk Management…
Getting video files from your Linux machine to an iPhone for offline viewing doesn’t require iTunes or complex workarounds. Here are the practical methods that actually work in 2026. Quick Upload via VLC’s WiFi Interface VLC for iOS remains the most straightforward approach for occasional transfers. It’s free, open-source, and handles virtually any codec you…
Emacs doesn’t restore your cursor to the last editing position by default—Vim does this out of the box. Fortunately, save-place-mode is built into Emacs and requires minimal configuration to enable this behavior. Basic Setup Add this to your ~/.emacs.d/init.el: (save-place-mode 1) That’s all you need. The mode automatically saves your cursor position when you close…
UDP packet loss on Linux commonly stems from undersized kernel buffers. When packets arrive faster than the application can process them, the kernel drops excess datagrams silently. Unlike TCP, UDP offers no retransmission, so these losses are permanent. Proper buffer tuning is essential for DNS servers, NTP, monitoring systems, video streaming, and any high-throughput UDP…
awk is the most efficient approach for this task. It processes the file in a single pass and doesn’t load data into memory: awk ‘{ total += $5; count++ } END { print total/count }’ file.txt This assumes your numeric value is the 5th whitespace-delimited field. For a file like: Run 0: Time used: 22.235331711…
The simplest approach creates a JAR with just your project’s compiled classes: sbt package This outputs to target/scala-2.x.y/projectname_2.x.y-zz.jar. The naming convention includes the Scala version to prevent classpath conflicts when multiple Scala versions coexist. For iterative development, use watch mode: sbt ~package This rebuilds the JAR after every source change. However, this JAR only contains…
If you need millisecond precision timestamps from the command line, there are several approaches depending on your use case and system requirements. Using date with %3N The simplest and most reliable method on modern GNU coreutils (8.32+) is: date +%s%3N This outputs seconds since epoch followed by exactly three digits of nanosecond precision (milliseconds). Example…
When working with multiple Scala projects, you’ll often need different sbt versions. A project using sbt 1.9.x may not be compatible with sbt 0.13.x, and manually switching between system-wide installations becomes tedious and error-prone. Using sbt-extras for automatic version detection The most reliable approach is sbt-extras, a wrapper script that automatically detects and uses the…
To determine file size in C, use stat() to populate a struct stat and read the st_size field. Here’s the correct approach: #include <sys/stat.h> #include <stdio.h> off_t file_length(const char *path) { struct stat st; if (stat(path, &st) == -1) { perror(“stat”); return -1; } return st.st_size; } Why off_t and not long Using off_t as…
If you’ve compiled a kernel module for a specific kernel version or need to pin a package to prevent automatic updates, you’ll want to exclude it from yum or dnf. There are several approaches depending on whether you need a permanent exclusion, per-repository exclusion, or temporary lockdown. Global Exclusions in Configuration The simplest approach is…
Git branching is fundamental to modern development workflows. A branch is a lightweight pointer to a commit that lets you work on multiple features, fixes, or experiments in parallel without affecting the main codebase. Understanding branching well is essential for team collaboration and maintaining a clean project history. Creating and Switching Branches Create a new…
IBus daemon restarts aren’t always straightforward in GNOME, especially since menu options have been removed. You’ll need to kill the daemon and start a fresh one. Quick restart Kill the current IBus daemon: pkill -o ibus-daemon The -o flag terminates only the oldest process, which is typically the main daemon (not child processes). IBus usually…
Running Internet Explorer on Linux through Wine is theoretically possible but practically untenable. If you need to test in IE, understand upfront: Wine support for IE is broken, unmaintained, and will waste your time. Why IE on Wine Doesn’t Work Internet Explorer depends on a stack of Windows-specific components that Wine’s compatibility layer can’t reliably…
The sort command’s -n flag only handles decimal numbers. When you apply it to hexadecimal values, it falls back to lexicographic (alphabetical) sorting, which produces incorrect results since hex digits don’t follow numeric order alphabetically. Given a file with hex addresses: 400000000 __crt0 400000039 __newr0 400001B14 get_my_task_id 200000020 reg1 20400001000 status Running sort -n will…
Chrome aggressively caches HTTP redirects—especially 301 (permanent) and 308 redirects—as a performance optimization. The cache persists across browser sessions, which causes real problems when you’ve updated redirect rules and need to test them immediately. Understanding Chrome’s Redirect Cache Behavior Chrome stores redirect information at the browser level, separate from typical page caches. This means: 301…
GDM (GNOME Display Manager) lets you control which users appear on the login screen. You have two main options: hide the entire user list or exclude specific users while keeping the list visible for others. Disable the user list entirely The most straightforward approach is to disable user listing completely. This forces everyone to type…
You can fetch a webpage as if you’re requesting from a mobile device by setting curl’s User-Agent header to match a mobile browser. Remote servers use the User-Agent header to decide whether to serve mobile or desktop versions of pages. Basic syntax Use the -A (or –user-agent) flag to specify a mobile User-Agent string: curl…