如何使用Shell从文件中的一行复制值并将其粘贴到新文件中？

Question

I have a file containing my personal details (.txt). How can I, via a shell script, copy only a few lines in the file and bring it to a new .txt file?.

Name: Nik
Date of Birth: 5.06.92
Address: 1234 Main St.
SSN: 123-45-6789

I would like to copy my address 1234 Main St. to another file.

Answer 1

怎么样：

awk -F': ' '/^Address/{print $2}' personalinfo.txt | tee newfile.txt

Answer 2

If you want to copy a specific line by its number :

sed -n '1 p' personal_details.txt > newfile.txt # Where 1 is the line number

If you want to copy a line by its contents :

grep 'Name' personal_details.txt > newfile.txt

If you want to copy a line but only its value, not the name of the field:

awk -F':' '/^Name/ {print $2}'  personal_details.txt > newfile.txt

Regards!

Answer 3

Just in case you would like to use only grep or pcregrep (in case you are on a macOS):

grep -oP "Address: \K.+" file.txt > newfile.txt

Or in macOS:

pcregrep -o "Address: \K.+" file.txt > newfile.txt

The \\K can be read as exclude everything at the left before it and return only the right part .+