# Append to File with Shell
Append output of a command to an existing file with the redirection operator >>
echo "Text to append" >> file.txt
+++
To interpret backslash escaped characters, we can use the -e option:
echo -e "abc\ndef\nghi" >> file.txt
# Content of file.txt:
# abc
# def
# ghi
+++
We can append output of any command, for example:
date +"Year: %Y, Month: %m, Day: %d" >> file.txt
+++
Append with Heredoc. A Here document (Heredoc) is a type of redirection that allows you to pass multiple lines of input to a command. More on heredoc here
cat << EOF >> file.txt
a quick brown fox jumps over the lazy dog
append file with heredoc
EOF
Posted on: Thu, 03 Jun 2021 14:27:17 GMT