Question

Explain grep command and its use.

Answer 1

grep command in Linux is used to search a specific pattern. Grep command will help you to explore the string in a file or multiple files.

The syntax for grep command:

• grep ‘word’ filename
• grep ‘word’ file1 file2 file3
• command|grep‘string’
• For example,
• grep “smith” passwd
• grep “smith” passwd shadow
• netstat -an | grep8083
• cat /etc/passwd | grep smith

Answer 2

grep a search command that makes use of pattern-based searching. It makes use of options and parameters that are specified along with the command line and applies this pattern in searching the required file output.