When truncating strings, you often need to avoid cutting off in the middle of a word. The naive substr() approach will break words, so you need logic to backtrack to the previous word boundary. The problem Given a string like “ab cc dde ffg ff”, if you want a substring of maximum 7 characters starting…
HTML to plain text conversion is a common task in PHP applications — whether you’re sanitizing user input, preparing content for email, generating text previews, or creating searchable indexes. Here are the practical approaches. Using strip_tags() The simplest method is PHP’s built-in strip_tags() function: $html = ‘<p>Hello <strong>world</strong>!</p>’; $text = strip_tags($html); echo $text; // Output:…
If you’re running an older CentOS or RHEL system with Vim 7.4, upgrading to Vim 8 or later gives you modern features like async I/O, jobs API, terminal emulator support, and better plugin performance. Here are the practical approaches. Check Your Current Version $ vim –version VIM – Vi IMproved 7.4 (2013 Aug 10, compiled…
The full URL is commonly needed for redirects, canonical link headers, or logging. While PHP superglobals provide the raw components, how you assemble them matters for security and reliability. Using $_SERVER Superglobals The most direct approach uses the $_SERVER array: $url = (isset($_SERVER[‘HTTPS’]) ? “https” : “http”) . “://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]”; This reconstructs the scheme, host, and…
You can pause and resume any process on Linux using signals without stopping it completely. This is useful for managing resource-heavy jobs, debugging, or controlling execution flow without losing process state. Using SIGSTOP and SIGCONT The standard approach uses two signals: SIGSTOP: Pauses a process (cannot be caught or ignored) SIGCONT: Resumes a paused process…
When processing text data, you often need to extract everything from a certain field onward. awk makes this straightforward once you understand the mechanics. Basic Syntax The fundamental approach uses awk’s field variables and looping: awk ‘{for(i=N;i<=NF;i++) printf “%s “, $i; print “”}’ file.txt Replace N with the field number you want to start from….
Short open tags (<? ?>) create compatibility issues with XML declarations and are considered poor practice. While they’re disabled by default in modern PHP versions, you may need to manage this setting when working with legacy code or specific server configurations. Configuration Methods Via php.ini The primary way to control short open tags is through…
Files with replication factor 1 are a liability in production HDFS clusters. They have no redundancy, meaning a single node failure results in data loss. Identifying and fixing these files should be part of your regular cluster maintenance. Using the HDFS CLI The most straightforward approach is using hdfs fsck with output parsing: hdfs fsck…
Go’s net/http package provides straightforward methods for sending POST requests. The two main approaches are Post() for raw body content and PostForm() for URL-encoded form data. Using PostForm for Form Data PostForm() handles URL-encoded form submissions automatically, setting the Content-Type header to application/x-www-form-urlencoded: package main import ( “io” “net/http” “net/url” ) func main() { data…
Several methods exist to prepend a prefix string to each line of text. The right approach depends on your input source and performance requirements. Using sed The sed stream editor is the most portable and efficient approach: sed ‘s/^/PREFIX/’ file.txt This uses a substitution command where ^ matches the start of each line and PREFIX…
[md] PHP upload limits are controlled through the php.ini configuration file. On Ubuntu/Debian systems, the file location depends on your PHP version: /etc/php/8.3/apache2/php.ini # PHP 8.3 /etc/php/8.2/apache2/php.ini # PHP 8.2 /etc/php/8.1/apache2/php.ini # PHP 8.1 To find your actual PHP version and configuration path: php -i | grep “Loaded Configuration File” ## Key Configuration Directives Three…
Several approaches exist to detect active file access in Linux, ranging from simple procfs inspection to sophisticated kernel-level tracking. Using lsof The most straightforward method is lsof (list open files), which shows all files currently open by running processes: lsof /path/to/file This returns process ID, user, file descriptor, and access mode. To check only write…
To load a kernel module automatically at system startup, create a configuration file in /etc/modules-load.d/ with a .conf extension. The systemd-modules-load.service daemon reads these files during early boot and loads the specified modules. Basic method Create a new configuration file. For the ixgbe driver example: echo “ixgbe” | sudo tee /etc/modules-load.d/ixgbe.conf Or use your editor…
Monitoring server temperatures is essential for preventing hardware damage and maintaining system stability. Linux provides several tools to query thermal sensors and identify which components are running hot. Using lm-sensors The most reliable approach is lm-sensors, a userspace tool that reads temperature data from kernel drivers: # Install lm-sensors sudo apt install lm-sensors # Debian/Ubuntu…
The REPLACE() function is your primary tool for modifying string values within a column. It scans for a substring and replaces all occurrences with a new value. Basic syntax UPDATE table_name SET column_name = REPLACE(column_name, ‘old_string’, ‘new_string’) WHERE condition; Simple example Replace all instances of “old_domain” with “new_domain” in the email column: UPDATE users SET…
When launching WPS Office on Rocky Linux 9+ or similar distributions, you may encounter this error: $ wpp /opt/kingsoft/wps-office/office6/wpp: error while loading shared libraries: libbz2.so.1.0: cannot open shared object file: No such file or directory This is a library version mismatch issue common when WPS Office binaries were compiled against an older version of libbz2….
BAM files store aligned sequence reads in a compressed binary format. Counting reads by chromosome is a common task in genomics workflows—useful for quality control, coverage analysis, and identifying potential sequencing biases. Using samtools idxstats The fastest and most straightforward approach is samtools idxstats, which requires an indexed BAM file: samtools index reads.bam samtools idxstats…
EncFS is a FUSE-based encrypted overlay filesystem that was once popular for transparent file encryption. However, its use on Android has become impractical due to Android’s security architecture. Here’s what you need to know in 2026. Why EncFS Doesn’t Work Well on Android Anymore Android’s evolution has made direct EncFS usage difficult: Scoped Storage (enforced…
EncFS is a transparent encrypted filesystem that works well on Linux and macOS, but Windows doesn’t support it natively. If you’re migrating from Linux or need EncFS-specific functionality on Windows, you’ll need to either run it in a virtual machine or switch to Windows-native alternatives. Why EncFS Doesn’t Work on Windows EncFS relies on FUSE…
If you’re managing academic references, you need a tool that integrates seamlessly into your workflow. Here are the most practical open-source and free options available. Zotero Zotero is the strongest choice for researchers who want full control over their data. It’s open source, maintained by a nonprofit, and doesn’t require subscription fees. Core features: Browser…