Question

linux

Now use the date command and use redirection to APPEND today's date to the INSERTHERE file created (you want to append to the end of the file, not overwrite your name). What command did you use to do this?

Answer 1

This operation is called appending in Linux

There are four methods to do as given below:

1)Redirect text to file using> operator
2)Enter text to an existing file using >> operator
3)Enter the command output in an existing file
4)Apply using the tee command

Method 1:

Usually, operator> can be used to add text to an existing file. However, if the file is not available, it creates a new file. In addition, each time the> operator is used, it overwrites the contents of the file.

To override file content, use the operator as follows:

echo 'hello world'> append_example

Method 2:

In this way, the operator >> can be used to insert text at the end of the file without having to overwrite its contents. Similarly, if the file was not found, the command creates a new file.

Use operator >> to enter text as follows:

echo 'this is the second line' >> append_example

cat append_example

As you can see, using the >> operator, the text was added to the end of the file and did not overwrite the file content

Method 3:

Here we will add the release command at the end of the file.

Enter the value of the current active guide in the file as follows:

echo $ PWD >> append_example

Display file contents as follows:

cat append_example

Also, you can use any other command to put its content in a file.

day >> append_example

Display the contents of the file.

cat append_example

Method 4:
Additionally, you can use the tee command to enter text. Before using the tee, the command let's first create a second example file that we use in the tee command.

Create a second example of a file and insert some text into it as follows:

echo '11111111111'> append_example2

Show the contents of the second example file:

cat append_example2

Now let's use the tee command to insert the contents of one file into another file as follows.

cat append_example2 | tee -a addition_example

You can then display the contents of the file as follows:

cat append_example