August 12th, 2024 2:00 PM Mr. Q Categories: Command
Description:The wc (word count) command is used to count the number of lines, words, and bytes (or characters) in a file. It can also be used to count the number of bytes or characters only. Command: Sample Input file.txt: Sample Output: Explanation: Options: Example with -l Option: To count lines […] Read more »
August 12th, 2024 1:43 PM Mr. Q Categories: Command
Description:The diff command compares two files line by line and outputs the differences between them. It is useful for identifying changes between files, often used in version control systems. Command: Sample Input file1.txt: file2.txt: Sample Output: Explanation: Options: Example with -u Option: To show the differences in unified format: Sample […] Read more »
August 12th, 2024 1:42 PM Mr. Q Categories: Command
Description:The comm command compares two sorted files line by line and outputs three columns: Command: Sample Input file1.txt: file2.txt: Sample Output: Explanation: Options: Example with Options To display only lines that are common to both files: Sample Output with -12: This command is useful for comparing files, finding unique or […] Read more »
August 12th, 2024 12:47 PM Mr. Q Categories: Command
The perl command is a powerful programming language used for text processing, system administration, web development, and more. It provides extensive capabilities for string manipulation, file handling, and regular expressions. Command: Examples Description: Executes a Perl script that prints “Hello, World!” to the console. Sample Output: Description: Replaces all occurrences […] Read more »
August 12th, 2024 12:46 PM Mr. Q Categories: Command
The sed command is a stream editor used for filtering and transforming text. It processes text line by line and can perform various editing tasks, such as substitutions, deletions, and insertions. Command: Examples Description: Replaces the first occurrence of “old” with “new” in each line of filename.txt. Sample File (filename.txt): […] Read more »
August 12th, 2024 12:44 PM Mr. Q Categories: Command
The xargs command is used to build and execute command lines from standard input. It reads items from standard input, separated by spaces, newlines, or other delimiters, and executes a specified command with those items as arguments. Command: Examples Sample Input: Sample Output: Sample Input: Sample Output: Sample Input: Sample […] Read more »
August 12th, 2024 12:43 PM Mr. Q Categories: Command
The join command is used to merge lines of two files based on a common field. It is commonly used for combining data from two files with a shared key or column. Command: Examples Sample File (file1.txt): Sample File (file2.txt): Sample Output: Sample File (file1.csv): Sample File (file2.csv): Sample Output: […] Read more »
August 12th, 2024 12:36 PM Mr. Q Categories: Command
The tr command is used to translate or delete characters from input data. It’s commonly used for tasks such as changing character case, replacing specific characters, or deleting unwanted characters. Basic Syntax Options Examples 1. Convert Lowercase to Uppercase Command: Sample Input: Sample Output: Explanation: 2. Delete Specific Characters Command: […] Read more »
August 12th, 2024 12:28 PM Mr. Q Categories: Command
The cut command is used to extract sections from each line of input files or streams. It operates on text files or input streams and allows you to select specific columns or fields based on delimiters. Basic Syntax Options Examples 1. Extract Specific Fields from a CSV File Command: Sample […] Read more »
August 12th, 2024 12:15 PM Mr. Q Categories: Command
awk: Pattern Scanning and Processing Language Description: awk is a powerful text-processing language used for pattern scanning and reporting. It is particularly useful for handling data in text files and performing complex text manipulations and report generation. Common Arguments: Sample Code and Usage: Command: Sample File (file.csv): Execution: Explanation: Pre […] Read more »