shell scripting – CodeRavo

Obtaining Millisecond Precision Timestamps in Bash

Bash scripting often requires measuring time intervals or capturing timestamps with precision beyond seconds. While the … Obtaining Millisecond Precision Timestamps in BashRead more

Bash, date-command, epoch, Linux, milliseconds, precision, shell scripting, Time, time-measurement, timestamp

Mastering Quote Escaping in Bash Scripts

Introduction When working with shell scripts, particularly Bash, handling quotes—especially escaping them correctly—is a common challenge. … Mastering Quote Escaping in Bash ScriptsRead more

ascii-codes, backslashes, Bash, double-quotes, escaping-quotes, shell scripting, single-quotes, String Concatenation

Understanding and Fixing "Unary Operator Expected" Errors in Bash Scripts

Introduction In Bash scripting, encountering an error like "unary operator expected" can be perplexing for beginners. … Understanding and Fixing "Unary Operator Expected" Errors in Bash ScriptsRead more

Bash scripting, conditional expressions, quoting-variables, shell scripting, unary-operator-expected

String Replacement Techniques in Shell Scripts Using Variables

Introduction String manipulation is a fundamental task in shell scripting. One common requirement is to replace … String Replacement Techniques in Shell Scripts Using VariablesRead more

Bash, parameter-expansion, sed-command, shell scripting, string-replacement, variable-substitution

Using Logical Operators in Shell Commands

Logical operators are a fundamental concept in shell scripting, allowing you to control the flow of … Using Logical Operators in Shell CommandsRead more

conditional-execution, logical-operators, operator, separator, shell scripting

Leveraging Regular Expressions with the `find` Command

The find command is a powerful tool for locating files within a directory hierarchy. While it … Leveraging Regular Expressions with the `find` CommandRead more

Bash, file-management, file-searching, find, findutils, Linux, macOS, posix, regex, regular-expression, shell scripting

Capturing Groups with Regular Expressions in Unix Shell Scripts

Introduction Regular expressions (regex) are powerful tools used for pattern matching and string manipulation. In Unix-like … Capturing Groups with Regular Expressions in Unix Shell ScriptsRead more

Bash, capturing-groups, grep, pattern matching, pcregrep, regex, sed, shell scripting, unix

Extracting Columns with Awk

Awk is a powerful text-processing tool commonly used in Unix-like systems for manipulating data within files … Extracting Columns with AwkRead more

awk, column-extraction, cut, data manipulation, delimiter, fields, nf, printf, shell scripting, text-processing

Running Multiple Programs Simultaneously from a Bash Script

Introduction When managing tasks that involve running multiple programs at once, it is often necessary to … Running Multiple Programs Simultaneously from a Bash ScriptRead more

background-processes, bash-script, gnu-parallel, parallel-execution, shell scripting, subprocess-management, wait-command

Searching for Files by Name using Unix Commands

In Unix-like operating systems, there are several commands that can be used to search for files … Searching for Files by Name using Unix CommandsRead more

file-searching, find command, grep, regular expressions, shell scripting, tree-command, unix