Question

linux operating system

1) Give a command to search the file /etc/passwd for the string “sarwar”

2) Give the command for deleting the memos directory. How do you know that the directory has been deleted?

3) Give the command for searching a file named fruits for the string “apple”, sending the output of the command to a file called applefreq

Answer 1

1. We use grep command in linux to search for string in a file. command for that is- grep string filename

Required command is- grep sarwar /etc/passwd

2. :Linux command for deleting memos directory is-

rm -rf /memos

For checking if the directory exists this command is used-

[ -d /memos ]

If success is returned that means the directory still exists else it does not.

3. Command for  searching a file named fruits for the string “apple”, sending the output of the command to a file called applefreq is-

grep apple fruits > applefreq.txt