How to Add Chinese Input Method to Ubuntu Typing Chinese on Linux has never been easier. The two most popular “Input Method Engines” are IBus (default in GNOME) and Fcitx5 (preferred by many power users). Method 1: The Default (IBus + Intelligent Pinyin) Go to Settings -> Keyboard -> Input Sources. Click + and search…
Thunderbird is powerful and feature rich. But different users have different needs and it is not feasible to include all features into the base software, where a plugin system shines. Thunderbird, similar to Firefox from Mozilla, supports addons/plugins and has a large ecosystems. Here, we will introduce several addons to Thunderbird that make Thunderbird easier…
How to Test if a File or Directory Exists in Go In Go, there is no simple file_exists() function. Instead, we use os.Stat() and check the error type. The Standard Pattern import “os” func fileExists(path string) bool { _, err := os.Stat(path) return !os.IsNotExist(err) } Why Not Just Check err != nil? os.Stat can fail…
How to convert a string to lower case in Python? For example: “Abc” -> “abc” “BBB” -> “bbb” “abc” -> “abc” You can use the string.lower() method of Python: string.lower(s) Return a copy of s, but with upper case letters converted to lower case. Example: $ python Python 2.7.5 (default, Apr 11 2018, 07:36:10) [GCC…
How to Filter bbPress Content in WordPress bbPress is the standard forum plugin for WordPress. If you need to modify how forum topics or replies are displayed, you’ll use WordPress’s powerful “Filter” system. Using bbp_get_topic_content Filter add_filter(‘bbp_get_topic_content’, ‘my_custom_forum_filter’); function my_custom_forum_filter($content) { // Modify the content here return $content; } Modern WordPress Development in 2026 Block-Based…
In PHP, it is possible to call a function by its name as a string. This can be useful when the name of the function is not known until runtime, or when the name of the function is stored in a variable or retrieved from a database or other external source. To call a function…
How to Open a Port in Iptables Iptables is the classic Linux firewall utility. The Command sudo iptables -A INPUT -p tcp –dport 80 -j ACCEPT Linux Networking in 2026 In 2026, while iptables is still widely used, it is technically a compatibility layer over nftables, the modern successor. For new setups, many admins use…
We may want to add some swap space for a Linux box while only find that all disk space is partitioned and mounted. Some partition has large available free space. For such cases, we may not want to change the partition allocation. The solution may be to add a file based swap for Linux as…
before the packets ports (443) entering the firewall i would like to divert incoming packet of server (443) to input chain goes to FORWARD chain<br> so thats the incoming packets 100.43.xx.xx –sport 443 are send it to FORWARD instead of input chain<br> how to configure this in OUTPUT,FORWARD,POST AND PREROUTING CHAIN and this is my…
How to Check if a Path is a Block Device in Python In Linux, “everything is a file,” including hardware devices. Block devices (like hard drives and USB sticks) are represented as files in /dev. The Pythonic Way: os.path.isblockdev() import os if os.path.exists(“/dev/sda”): if os.path.isblockdev(“/dev/sda”): print(“It’s a block device!”) Why It Matters System Administration: Python…
How to Get the Full Path of a Python Script When writing scripts that need to load configuration files or assets relative to their own location, you can’t rely on the “current working directory” (.), as that changes depending on how the script was called. The Modern Way: pathlib (Python 3.4+) from pathlib import Path…
How to Test if a File or Directory Exists in C In C, checking for file existence involves the stat or access system calls. While simple, it’s important to handle errors correctly to avoid race conditions. Using stat() #include <sys/stat.h> int file_exists(const char *path) { struct stat buffer; return (stat(path, &buffer) == 0); } Using…
How To Rurn Off Wifi And Bluetooth Easily In Ios 11 Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based…
MPlayer has lots options for video rendering and filtering. Any suggestions on good MPlayer options that improve video rendering quality nicely? My ~/.mplayer/config is as follows with 2 profiles: [fast] vf=eq2 [default] vf=hqdn3d vo=gl:yuv=3:lscale=5:cscale=5 ao=pulse The default one gives good video quality by using the hqdn3d video filter while the CPU usage is high. If…
How to Decode a Quoted URL in Python URL encoding (also known as percent-encoding) is used to translate characters into a format that can be transmitted over the Internet. In Python, the urllib.parse module makes decoding these strings simple. The Modern Way: urllib.parse.unquote from urllib.parse import unquote encoded_url = “https://example.com/search?q=hello%20world” decoded_url = unquote(encoded_url) print(decoded_url) #…
How to Configure /dev/shm Size in Linux /dev/shm is a temporary filesystem (tmpfs) that uses your system’s RAM for high-speed file storage. The Fix Edit /etc/fstab and add: tmpfs /dev/shm tmpfs defaults,size=2G 0 0 Then remount: sudo mount -o remount /dev/shm Linux Memory in 2026 In 2026, /dev/shm is critical for high-performance applications like Oracle…
How to Produce a Patch File for a Git Commit Sharing a single commit as a patch file is a common workflow in open-source projects or when email-based code review is required. The Command git format-patch -1 <commit-hash> This creates a .patch file that includes the commit message, author info, and the diff. Applying the…
How to Exclude a Package from a Specific Yum Repository In enterprise Linux (RHEL, CentOS, AlmaLinux), you might want to prevent a specific package from being updated from a certain repository (like EPEL) to avoid version conflicts. The Command Line Way yum install my-package –exclude=epel The Permanent Way (/etc/yum.conf) Add this line to your [main]…
How to Clean the Commit History of a Git Repository “Cleaning” history usually means rewriting it to remove large files, sensitive data, or to squash messy commits into logical units. The Modern Tool: git filter-repo The old git filter-branch is now deprecated and dangerous. In 2026, everyone uses git-filter-repo. git filter-repo –path large-file.bin –invert-paths Interactive…
How to Escape the XML CDATA Section Ending Sequence In XML, CDATA sections are used to include text that should not be parsed by the XML parser. However, the string ]]> cannot appear inside a CDATA section because it signals the end of the section. The Workaround To include ]]> inside your data, you must…