This guide explains how to redirect standard streams, chain commands with pipes, and use essential text‑processing utilities such as tee, xargs, grep, cut, awk, sed, sort, wc, uniq, and tr on the Linux command line.
This guide explains the Linux sort command, detailing its most useful options, how to sort by numbers, fields, human‑readable sizes, remove duplicates, and write results to files, with clear command‑line examples for each scenario.
This guide explains the Linux sort command, covering its most useful options—such as numeric, human‑readable, case‑insensitive, field‑based, and reverse sorting—and demonstrates practical examples for default sorting, column sorting, deduplication, and writing results to files.
This guide explains how to use the Unix/Linux wc command to count lines, words, characters, and bytes in files, detailing each option with clear examples and showing how to display the longest line length.
Learn how to use the powerful Linux sed command to delete specific lines, ranges, empty lines, or pattern‑matched lines from a file, including in‑place editing with the -i option, through clear examples and step‑by‑step syntax.
This guide explains how to install the overtrue/pinyin Composer package and demonstrates various PHP methods for converting Chinese text to pinyin, including tone styles, array output, permalink generation, abbreviation extraction, handling polyphones, and using the command‑line tool.
This article introduces a collection of essential Linux/macOS command‑line tools—such as find, grep, awk, sed, and others—explaining their key options and demonstrating practical examples like log analysis, database URL correction, and bulk file processing to dramatically improve everyday developer productivity.
This guide explains how to use the powerful grep command to search for multiple strings simultaneously, covering basic, extended, and Perl-compatible regular expressions, the OR operator syntax, case‑insensitive searches, whole‑word matching, and practical examples for log file analysis.
This article introduces a collection of essential Linux command‑line utilities—including col, colrm, comm, csplit, ed, egrep, ex, fgrep, fmt, fold, grep, ispell, jed, joe, join, look, mtype, pico, rgrep, sed, sort, spell, tr, expr, uniq, wc, and let—explaining their primary functions for filtering, editing, searching, and manipulating text and files.
This guide presents a collection of practical Linux command‑line one‑liners that demonstrate how to join filenames, reverse lines, strip comments, trim characters, compute column statistics, generate DNA reverse complements, merge files, deduplicate, and perform other common text‑processing tasks using tools such as ls, paste, xargs, awk, sed, cut and sort.
This guide explains grep's core concepts, syntax, and options, covering basic and extended regular expressions, character classes, quantifiers, anchors, grouping, and backreferences to help you efficiently filter and search text on the command line.
