FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Grep is a Linux / Unix command-line tool used to search for a string of characters in a specified file. The text search pattern is called a regular expression. When it finds a match, it prints the line with the result. The grep command is handy when searching through large log files.

Detailed explanation-2: -The grep command searches through the file, looking for matches to the pattern specified. To use it type grep, then the pattern we’re searching for and finally the name of the file (or files) we’re searching in. The output is the three lines in the file that contain the letters ‘not’.

Detailed explanation-3: -The grep command can search for a string in groups of files. When it finds a pattern that matches in more than one file, it prints the name of the file, followed by a colon, then the line matching the pattern.

Detailed explanation-4: -Use the grep command to search the specified file for the pattern specified by the Pattern parameter and writes each matching line to standard output. This displays all lines in the pgm.

Detailed explanation-5: -The most common way to find text in a Linux system is using the command-line utility grep .