How to Append Text to End of File in Linux
How do I append text to end of file using the cli on Linux? How to add lines to end of file? How to Linux logs work?! What command I need to type to send the output of the command to end of file?!
You need to use the ">>" to append text to end of file. It is also useful to redirect and append/add line to end of file on Linux or Unix-like system.
Append Text Using >> Operator
Using >> you add a new line of specific text to your text file.
# Append a row in a text file
echo "Lateweb.info is one hell of a good site" >> filename.txt
or
printf "If you like us please subscribe for our youtube channel" >> filename.txt
You can also use the cat command to link text from one or more files and add it to another file.
cat /var/log/auth.log >> filename.txt
As you may have guessed, you can use different commands to insert values into additional rows. Another such example is the ls command to list files and folders.
# Add a list of files and folder to filename.txt
ls >> files.txt
the difference between> and >> is that one > overwrites a line and two >> adds a new line. To avoid mistakes, always check carefully how many characters you have written when writing> and >>
Difference between > and >>
Typically ```
>
Typically ```
>>
``` is used for items such as logging events, parsing or other data processing where data is created or transformed piece by piece into a new form
Both commands redirect output of command to file ```
list
```. ```
>
``` will create/replace the output file with name ```
list
```. ```
>>
``` will create (if file ```
list
``` not exists already) or append the file ```
list
```. <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button>
<strong>Examples:</strong><br>```
$ ls > allmyfiles.txt
``` creates the file "allmyfiles.txt" and fills it with the directory listing from the ls command
$ echo "End of directory listing" >> allmyfiles.txt
$ > newzerobytefile
Quick video on the topic
https://youtu.be/GPAL-XU4BA4
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