Bash Shell Scripting- Find and replace with sed command

This video tutorial covers the use of the sed command for find and replace operations in files. It begins with a basic introduction to the command, followed by examples of replacing words in a file. Advanced techniques are discussed, including replacing only the first occurrence of a word, replacing all occurrences, and using the global option. The tutorial also covers conditional replacements based on search criteria, ensuring that original files remain unchanged unless specified. The importance of taking backups before modifying files is emphasized.

What is one of the basic operations of the SED command?

• Compiling code

• Viewing file content based on line numbers

• Creating databases

• Encrypting files

When using the SED command for find and replace, what is the default behavior?

• Replaces the first occurrence of the word in each line

• Replaces the last occurrence of the word

• Replaces all occurrences of the word

• Does not replace any word

What is the effect of not using any option after the substitute command in SED?

• Only the first occurrence in each line is replaced

• The file is deleted

• All occurrences in the file are replaced

• No replacement occurs

How can you replace all occurrences of a word in each line using the SED command?

• By using the -i option

• By using the -a option

• By using the -g option

• By using the G option

What does the 'G' option do in the SED command?

• Replaces all occurrences of a word

• Replaces the first occurrence of a word

• Replaces the last occurrence of a word

• Replaces a word only if it is at the beginning of a line

What should you do before modifying the original file with the SED command?

• Compress the original file

• Rename the original file

• Take a backup of the original file

• Delete the original file

How can you replace only the second occurrence of a word in a line using the SED command?

• Use the -s option

• Use the 2 option after the word

• Use the -2 option

• Use the -n option

Which option is used to modify the original file directly with the SED command?

• -p

• -o

• -i

• -b

What is a potential risk of using the -i option in the SED command?

• It can create a duplicate file

• It can delete the file

• It can permanently modify the original file

• It can encrypt the file

What is the purpose of combining search and replace in the SED command?

• To encrypt the file content

• To compile the file into an executable

• To replace words only in lines that contain a specific search term

• To delete all lines in a file