Create file.txt with the following content: 48 Dec 3BC1977 LPSX 68.00 LVX2A 138 483 Sept 5AP1996 USP 65.00 LVX2C 189 47 Oct 3ZL1998 LPSX 43.00 KVM9D 512 219 dec 2CC1999 CAD 23.00 PLV2C 68 484 nov 7PL1996 CAD 49.00 PLV2C 234 483 may 5PA1998 USP 37.00 KVM9D 644 216 sept 3ZL1998 USP 86.00 KVM9E 234 Cou...
AWK is a powerful text analysis tool, particularly adept at data processing and report generation. It reads input line by line, splits each line in to fields by a default delimiter (space), and performs analysis on the segmented parts. The basic syntax is: awk 'pattern { action }' filenames. Here, p...
Introduction to sed -i The sed (stream editor) command is a powerful text manipulation tool in Unix-like systems. While the standard sed outputs modified content to the terminal, the -i flag enables in-place editing, allowing direct modification of file contents without redirection. Basic Syntax sed...
Removing a specific internal sequence from a Java string requires generating a new instance due to the immutable nature of the String class. Two primary techniques accomplish this: direct literal substitution and regular expression matching. Direct Literal Substitution The most straightforward appro...
Removing Lines Adjacent to Patterns To remove the line immediately preceding and following a specific pattern, combine address ranges with flow control commands. sed -i -e '/ERROR/{n;d}' -e '$!N;/\n.*ERROR/!P;D' system.log Deleting the Preceding Line When only the line before a match is required to...
Regular expressions provide a specialized syntax for identifying and manipulating text sequences. In Python, the standard library offers this capability through the re package. Developers utilize these patterns for validation, extraction, and transformation tasks. Pattern Syntax Fundamentals Matchin...
Fetching JSON Data with curl # Print JSON data directly to the terminal curl -H 'Authorization: Bearer api_key="a1b2c3d4e5f67890"' https://api.example.com/data.json # Store the curl output in a shell variable json_data=$(curl -H 'Authorization: Bearer api_key="a1b2c3d4e5f67890"'...